120406399650 has 72 divisors (see below), whose sum is σ = 323531635284. Its totient is φ = 32104425600.

The previous prime is 120406399643. The next prime is 120406399657. The reversal of 120406399650 is 56993604021.

120406399650 is a `hidden beast` number, since 1 + 2 + 0 + 4 + 0 + 639 + 9 + 6 + 5 + 0 = 666.

120406399650 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (120406399643) and next prime (120406399657).

It can be written as a sum of positive squares in 6 ways, for example, as 63106966521 + 57299433129 = 251211^2 + 239373^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 120406399596 and 120406399605.

It is not an unprimeable number, because it can be changed into a prime (120406399657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6613560 + ... + 6631740.

Almost surely, 2^120406399650 is an apocalyptic number.

120406399650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120406399650 is an abundant number, since it is smaller than the sum of its proper divisors (203125235634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120406399650 is a wasteful number, since it uses less digits than its factorization.

120406399650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32916 (or 32908 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 120406399650 in words is "one hundred twenty billion, four hundred six million, three hundred ninety-nine thousand, six hundred fifty".