120647951550 has 384 divisors, whose sum is σ = 384896793600. Its totient is φ = 27220354560.

The previous prime is 120647951537. The next prime is 120647951551. The reversal of 120647951550 is 55159746021.

It is a happy number.

120647951550 is a `hidden beast` number, since 1 + 2 + 0 + 6 + 4 + 7 + 95 + 1 + 550 = 666.

It is a super-2 number, since 2×120647951550² (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 = 120647951496 and 120647951505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120647951551) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 426317709 + ... + 426317991.

It is an arithmetic number, because the mean of its divisors is an integer number (1002335400).

Almost surely, 2^120647951550 is an apocalyptic number.

120647951550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 120647951550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192448396800).

120647951550 is an abundant number, since it is smaller than the sum of its proper divisors (264248842050).

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

120647951550 is a wasteful number, since it uses less digits than its factorization.

120647951550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The spelling of 120647951550 in words is "one hundred twenty billion, six hundred forty-seven million, nine hundred fifty-one thousand, five hundred fifty".