120157715491 has 48 divisors (see below), whose sum is σ = 141697987200. Its totient is φ = 101503860480.

The previous prime is 120157715473. The next prime is 120157715497. The reversal of 120157715491 is 194517751021.

It is not a de Polignac number, because 120157715491 - 2⁵ = 120157715459 is a prime.

It is a super-2 number, since 2×120157715491² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (120157715497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92642155 + ... + 92643451.

It is an arithmetic number, because the mean of its divisors is an integer number (2952041400).

Almost surely, 2^120157715491 is an apocalyptic number.

120157715491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

120157715491 is a deficient number, since it is larger than the sum of its proper divisors (21540271709).

120157715491 is a wasteful number, since it uses less digits than its factorization.

120157715491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080 (or 2069 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 43.

The spelling of 120157715491 in words is "one hundred twenty billion, one hundred fifty-seven million, seven hundred fifteen thousand, four hundred ninety-one".