172487137057 has 2 divisors, whose sum is σ = 172487137058. Its totient is φ = 172487137056.

The previous prime is 172487137051. The next prime is 172487137073. The reversal of 172487137057 is 750731784271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91862941921 + 80624195136 = 303089^2 + 283944^2 .

It is a cyclic number.

It is not a de Polignac number, because 172487137057 - 2⁷ = 172487136929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172487136995 and 172487137013.

It is not a weakly prime, because it can be changed into another prime (172487137051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86243568528 + 86243568529.

It is an arithmetic number, because the mean of its divisors is an integer number (86243568529).

Almost surely, 2^172487137057 is an apocalyptic number.

It is an amenable number.

172487137057 is a deficient number, since it is larger than the sum of its proper divisors (1).

172487137057 is an equidigital number, since it uses as much as digits as its factorization.

172487137057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304960, while the sum is 52.

The spelling of 172487137057 in words is "one hundred seventy-two billion, four hundred eighty-seven million, one hundred thirty-seven thousand, fifty-seven".