157716534146721 has 32 divisors (see below), whose sum is σ = 234778443701760. Its totient is φ = 93373084464000.

The previous prime is 157716534146687. The next prime is 157716534146747. The reversal of 157716534146721 is 127641435617751.

It is not a de Polignac number, because 157716534146721 - 2⁶ = 157716534146657 is a prime.

It is a super-2 number, since 2×157716534146721² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157716534196721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 323249455 + ... + 323736996.

It is an arithmetic number, because the mean of its divisors is an integer number (7336826365680).

Almost surely, 2^{157716534146721} is an apocalyptic number.

157716534146721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

157716534146721 is a deficient number, since it is larger than the sum of its proper divisors (77061909555039).

157716534146721 is a wasteful number, since it uses less digits than its factorization.

157716534146721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646986637.

The product of its digits is 29635200, while the sum is 60.

The spelling of 157716534146721 in words is "one hundred fifty-seven trillion, seven hundred sixteen billion, five hundred thirty-four million, one hundred forty-six thousand, seven hundred twenty-one".