157884024718681 has 2 divisors, whose sum is σ = 157884024718682. Its totient is φ = 157884024718680.

The previous prime is 157884024718649. The next prime is 157884024718687. The reversal of 157884024718681 is 186817420488751.

157884024718681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122140426544656 + 35743598174025 = 11051716^2 + 5978595^2 .

It is a cyclic number.

It is not a de Polignac number, because 157884024718681 - 2⁵ = 157884024718649 is a prime.

It is a super-2 number, since 2×157884024718681² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 157884024718681.

It is not a weakly prime, because it can be changed into another prime (157884024718687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78942012359340 + 78942012359341.

It is an arithmetic number, because the mean of its divisors is an integer number (78942012359341).

Almost surely, 2^{157884024718681} is an apocalyptic number.

It is an amenable number.

157884024718681 is a deficient number, since it is larger than the sum of its proper divisors (1).

157884024718681 is an equidigital number, since it uses as much as digits as its factorization.

157884024718681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192675840, while the sum is 70.

The spelling of 157884024718681 in words is "one hundred fifty-seven trillion, eight hundred eighty-four billion, twenty-four million, seven hundred eighteen thousand, six hundred eighty-one".