172615510481 has 2 divisors, whose sum is σ = 172615510482. Its totient is φ = 172615510480.

The previous prime is 172615510453. The next prime is 172615510489. The reversal of 172615510481 is 184015516271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112013379856 + 60602130625 = 334684^2 + 246175^2 .

It is a cyclic number.

It is not a de Polignac number, because 172615510481 - 2²² = 172611316177 is a prime.

It is a super-3 number, since 3×172615510481³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (172615510489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86307755240 + 86307755241.

It is an arithmetic number, because the mean of its divisors is an integer number (86307755241).

Almost surely, 2^172615510481 is an apocalyptic number.

It is an amenable number.

172615510481 is a deficient number, since it is larger than the sum of its proper divisors (1).

172615510481 is an equidigital number, since it uses as much as digits as its factorization.

172615510481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 41.

The spelling of 172615510481 in words is "one hundred seventy-two billion, six hundred fifteen million, five hundred ten thousand, four hundred eighty-one".