172905794499 has 8 divisors (see below), whose sum is σ = 231292008640. Its totient is φ = 114895055016.

The previous prime is 172905794443. The next prime is 172905794539. The reversal of 172905794499 is 994497509271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172905794499 - 2⁷ = 172905794371 is a prime.

It is a super-2 number, since 2×172905794499² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172905794099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93867589 + ... + 93869430.

It is an arithmetic number, because the mean of its divisors is an integer number (28911501080).

Almost surely, 2^172905794499 is an apocalyptic number.

172905794499 is a deficient number, since it is larger than the sum of its proper divisors (58386214141).

172905794499 is a wasteful number, since it uses less digits than its factorization.

172905794499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187737329.

The product of its (nonzero) digits is 51438240, while the sum is 66.

The spelling of 172905794499 in words is "one hundred seventy-two billion, nine hundred five million, seven hundred ninety-four thousand, four hundred ninety-nine".