73504543172 has 12 divisors (see below), whose sum is σ = 128762758656. Its totient is φ = 36715183560.

The previous prime is 73504543159. The next prime is 73504543181. The reversal of 73504543172 is 27134540537.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9267548 + ... + 9275475.

It is an arithmetic number, because the mean of its divisors is an integer number (10730229888).

Almost surely, 2^73504543172 is an apocalyptic number.

It is an amenable number.

73504543172 is a deficient number, since it is larger than the sum of its proper divisors (55258215484).

73504543172 is a wasteful number, since it uses less digits than its factorization.

73504543172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18544018 (or 18544016 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 41.

The spelling of 73504543172 in words is "seventy-three billion, five hundred four million, five hundred forty-three thousand, one hundred seventy-two".