157652681 has 2 divisors, whose sum is σ = 157652682. Its totient is φ = 157652680.

The previous prime is 157652657. The next prime is 157652689. The reversal of 157652681 is 186256751.

157652681 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., 139240000 + 18412681 = 11800^2 + 4291^2 .

It is an emirp because it is prime and its reverse (186256751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157652681 - 2¹⁰ = 157651657 is a prime.

It is a super-2 number, since 2×157652681² = 49708735652975522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157652689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78826340 + 78826341.

It is an arithmetic number, because the mean of its divisors is an integer number (78826341).

Almost surely, 2^157652681 is an apocalyptic number.

It is an amenable number.

157652681 is a deficient number, since it is larger than the sum of its proper divisors (1).

157652681 is an equidigital number, since it uses as much as digits as its factorization.

157652681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 41.

The square root of 157652681 is about 12555.9818811593. The cubic root of 157652681 is about 540.2155986373.

The spelling of 157652681 in words is "one hundred fifty-seven million, six hundred fifty-two thousand, six hundred eighty-one".