85417072172 has 6 divisors (see below), whose sum is σ = 149479876308. Its totient is φ = 42708536084.

The previous prime is 85417072157. The next prime is 85417072183. The reversal of 85417072172 is 27127071458.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10677134018 + ... + 10677134025.

It is an arithmetic number, because the mean of its divisors is an integer number (24913312718).

Almost surely, 2^85417072172 is an apocalyptic number.

It is an amenable number.

85417072172 is a deficient number, since it is larger than the sum of its proper divisors (64062804136).

85417072172 is a wasteful number, since it uses less digits than its factorization.

85417072172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21354268047 (or 21354268045 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 44.

The spelling of 85417072172 in words is "eighty-five billion, four hundred seventeen million, seventy-two thousand, one hundred seventy-two".