157725810961489 has 2 divisors, whose sum is σ = 157725810961490. Its totient is φ = 157725810961488.

The previous prime is 157725810961447. The next prime is 157725810961519. The reversal of 157725810961489 is 984169018527751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104983938191889 + 52741872769600 = 10246167^2 + 7262360^2 .

It is a cyclic number.

It is not a de Polignac number, because 157725810961489 - 2²⁹ = 157725274090577 is a prime.

It is not a weakly prime, because it can be changed into another prime (157725810961429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78862905480744 + 78862905480745.

It is an arithmetic number, because the mean of its divisors is an integer number (78862905480745).

Almost surely, 2^{157725810961489} is an apocalyptic number.

It is an amenable number.

157725810961489 is a deficient number, since it is larger than the sum of its proper divisors (1).

157725810961489 is an equidigital number, since it uses as much as digits as its factorization.

157725810961489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 304819200, while the sum is 73.

The spelling of 157725810961489 in words is "one hundred fifty-seven trillion, seven hundred twenty-five billion, eight hundred ten million, nine hundred sixty-one thousand, four hundred eighty-nine".