157725810961447 has 2 divisors, whose sum is σ = 157725810961448. Its totient is φ = 157725810961446.

The previous prime is 157725810961429. The next prime is 157725810961489. The reversal of 157725810961447 is 744169018527751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157725810961447 - 2²³ = 157725802572839 is a prime.

It is a super-2 number, since 2×157725810961447² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157725810961247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78862905480723 + 78862905480724.

It is an arithmetic number, because the mean of its divisors is an integer number (78862905480724).

Almost surely, 2^{157725810961447} is an apocalyptic number.

157725810961447 is a deficient number, since it is larger than the sum of its proper divisors (1).

157725810961447 is an equidigital number, since it uses as much as digits as its factorization.

157725810961447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118540800, while the sum is 67.

The spelling of 157725810961447 in words is "one hundred fifty-seven trillion, seven hundred twenty-five billion, eight hundred ten million, nine hundred sixty-one thousand, four hundred forty-seven".