120661646850 has 36 divisors (see below), whose sum is σ = 324177625746. Its totient is φ = 32176439040.

The previous prime is 120661646821. The next prime is 120661646863. The reversal of 120661646850 is 58646166021.

120661646850 is a `hidden beast` number, since 1 + 20 + 6 + 616 + 4 + 6 + 8 + 5 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 95943204009 + 24718442841 = 309747^2 + 157221^2 .

It is a super-2 number, since 2×120661646850² (a number of 23 digits) contains 22 as substring.

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 = 120661646796 and 120661646805.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 134068047 + ... + 134068946.

Almost surely, 2^120661646850 is an apocalyptic number.

120661646850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120661646850 is an abundant number, since it is smaller than the sum of its proper divisors (203515978896).

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

120661646850 is a wasteful number, since it uses less digits than its factorization.

120661646850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268137011 (or 268137003 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 120661646850 in words is "one hundred twenty billion, six hundred sixty-one million, six hundred forty-six thousand, eight hundred fifty".