172490752798 has 24 divisors (see below), whose sum is σ = 320194165968. Its totient is φ = 68238099072.

The previous prime is 172490752783. The next prime is 172490752801. The reversal of 172490752798 is 897257094271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36449611 + ... + 36454342.

It is an arithmetic number, because the mean of its divisors is an integer number (13341423582).

Almost surely, 2^172490752798 is an apocalyptic number.

172490752798 is a deficient number, since it is larger than the sum of its proper divisors (147703413170).

172490752798 is a wasteful number, since it uses less digits than its factorization.

172490752798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72903988 (or 72903975 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 61.

The spelling of 172490752798 in words is "one hundred seventy-two billion, four hundred ninety million, seven hundred fifty-two thousand, seven hundred ninety-eight".