157996882681 has 6 divisors (see below), whose sum is σ = 173665995146. Its totient is φ = 143633529600.

The previous prime is 157996882669. The next prime is 157996882699. The reversal of 157996882681 is 186288699751.

157996882681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 94654060281 + 63342822400 = 307659^2 + 251680^2 .

It is not a de Polignac number, because 157996882681 - 2¹⁹ = 157996358393 is a prime.

It is a super-2 number, since 2×157996882681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157996882681.

It is not an unprimeable number, because it can be changed into a prime (157996832681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 652879560 + ... + 652879801.

Almost surely, 2^157996882681 is an apocalyptic number.

157996882681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

157996882681 is a deficient number, since it is larger than the sum of its proper divisors (15669112465).

157996882681 is a wasteful number, since it uses less digits than its factorization.

157996882681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305759383 (or 1305759372 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 70.

The spelling of 157996882681 in words is "one hundred fifty-seven billion, nine hundred ninety-six million, eight hundred eighty-two thousand, six hundred eighty-one".