73978787832 has 64 divisors (see below), whose sum is σ = 185868103680. Its totient is φ = 24537088512.

The previous prime is 73978787821. The next prime is 73978787843. The reversal of 73978787832 is 23878787937.

It is an interprime number because it is at equal distance from previous prime (73978787821) and next prime (73978787843).

It is a super-2 number, since 2×73978787832² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3970843 + ... + 3989429.

It is an arithmetic number, because the mean of its divisors is an integer number (2904189120).

Almost surely, 2^73978787832 is an apocalyptic number.

It is an amenable number.

73978787832 is an abundant number, since it is smaller than the sum of its proper divisors (111889315848).

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

73978787832 is a wasteful number, since it uses less digits than its factorization.

73978787832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19412 (or 19408 counting only the distinct ones).

The product of its digits is 199148544, while the sum is 69.

The spelling of 73978787832 in words is "seventy-three billion, nine hundred seventy-eight million, seven hundred eighty-seven thousand, eight hundred thirty-two".