78472998272 has 32 divisors (see below), whose sum is σ = 157003942680. Its totient is φ = 39068087296.

The previous prime is 78472998269. The next prime is 78472998281. The reversal of 78472998272 is 27289927487.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×78472998272² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78472998199 and 78472998208.

It is a congruent 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, 1285778 + ... + 1345425.

Almost surely, 2^78472998272 is an apocalyptic number.

It is an amenable number.

78472998272 is an abundant number, since it is smaller than the sum of its proper divisors (78530944408).

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

78472998272 is a wasteful number, since it uses less digits than its factorization.

78472998272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631450 (or 2631438 counting only the distinct ones).

The product of its digits is 56899584, while the sum is 65.

The spelling of 78472998272 in words is "seventy-eight billion, four hundred seventy-two million, nine hundred ninety-eight thousand, two hundred seventy-two".