43687797720 has 64 divisors (see below), whose sum is σ = 149786737920. Its totient is φ = 9985782144.

The previous prime is 43687797719. The next prime is 43687797733. The reversal of 43687797720 is 2779778634.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 26003802 + ... + 26005481.

It is an arithmetic number, because the mean of its divisors is an integer number (2340417780).

Almost surely, 2^43687797720 is an apocalyptic number.

43687797720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43687797720 is an abundant number, since it is smaller than the sum of its proper divisors (106098940200).

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

43687797720 is a wasteful number, since it uses less digits than its factorization.

43687797720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52009304 (or 52009300 counting only the distinct ones).

The product of its (nonzero) digits is 24893568, while the sum is 60.

The spelling of 43687797720 in words is "forty-three billion, six hundred eighty-seven million, seven hundred ninety-seven thousand, seven hundred twenty".