120645413520 has 80 divisors (see below), whose sum is σ = 374455830912. Its totient is φ = 32132966400.

The previous prime is 120645413479. The next prime is 120645413531. The reversal of 120645413520 is 25314546021.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107881 + ... + 502920.

Almost surely, 2^120645413520 is an apocalyptic number.

120645413520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120645413520 is an abundant number, since it is smaller than the sum of its proper divisors (253810417392).

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

120645413520 is a wasteful number, since it uses less digits than its factorization.

120645413520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611640 (or 611634 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 120645413520 its reverse (25314546021), we get a palindrome (145959959541).

The spelling of 120645413520 in words is "one hundred twenty billion, six hundred forty-five million, four hundred thirteen thousand, five hundred twenty".