2917489517172 has 18 divisors (see below), whose sum is σ = 7374765168498. Its totient is φ = 972496505712.

The previous prime is 2917489517119. The next prime is 2917489517233. The reversal of 2917489517172 is 2717159847192.

2917489517172 is a `hidden beast` number, since 2 + 9 + 1 + 7 + 48 + 9 + 517 + 1 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2159242158096 + 758247359076 = 1469436^2 + 870774^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40520687703 + ... + 40520687774.

Almost surely, 2^{2917489517172} is an apocalyptic number.

It is an amenable number.

2917489517172 is an abundant number, since it is smaller than the sum of its proper divisors (4457275651326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2917489517172 is a wasteful number, since it uses less digits than its factorization.

2917489517172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81041375487 (or 81041375482 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 63.

The spelling of 2917489517172 in words is "two trillion, nine hundred seventeen billion, four hundred eighty-nine million, five hundred seventeen thousand, one hundred seventy-two".