6378172020 has 72 divisors (see below), whose sum is σ = 21105957600. Its totient is φ = 1546223040.

The previous prime is 6378172019. The next prime is 6378172063. The reversal of 6378172020 is 202718736.

6378172020 is a `hidden beast` number, since 637 + 8 + 17 + 2 + 0 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1608670 + ... + 1612629.

It is an arithmetic number, because the mean of its divisors is an integer number (293138300).

Almost surely, 2^6378172020 is an apocalyptic number.

6378172020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6378172020 is an abundant number, since it is smaller than the sum of its proper divisors (14727785580).

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

6378172020 is a wasteful number, since it uses less digits than its factorization.

6378172020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221325 (or 3221320 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 6378172020 is about 79863.4586027928. The cubic root of 6378172020 is about 1854.5223686310.

The spelling of 6378172020 in words is "six billion, three hundred seventy-eight million, one hundred seventy-two thousand, twenty".