157083870721 has 2 divisors, whose sum is σ = 157083870722. Its totient is φ = 157083870720.

The previous prime is 157083870719. The next prime is 157083870743. The reversal of 157083870721 is 127078380751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139887220225 + 17196650496 = 374015^2 + 131136^2 .

It is a cyclic number.

It is not a de Polignac number, because 157083870721 - 2¹ = 157083870719 is a prime.

Together with 157083870719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (157083870221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78541935360 + 78541935361.

It is an arithmetic number, because the mean of its divisors is an integer number (78541935361).

Almost surely, 2^157083870721 is an apocalyptic number.

It is an amenable number.

157083870721 is a deficient number, since it is larger than the sum of its proper divisors (1).

157083870721 is an equidigital number, since it uses as much as digits as its factorization.

157083870721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 658560, while the sum is 49.

The spelling of 157083870721 in words is "one hundred fifty-seven billion, eighty-three million, eight hundred seventy thousand, seven hundred twenty-one".