8378407452664 has 32 divisors (see below), whose sum is σ = 16280397943200. Its totient is φ = 4037486696320.

The previous prime is 8378407452661. The next prime is 8378407452847. The reversal of 8378407452664 is 4662547048738.

It is a super-2 number, since 2×8378407452664² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8378407452596 and 8378407452605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8378407452661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32288932 + ... + 32547379.

It is an arithmetic number, because the mean of its divisors is an integer number (508762435725).

Almost surely, 2^{8378407452664} is an apocalyptic number.

It is an amenable number.

8378407452664 is a deficient number, since it is larger than the sum of its proper divisors (7901990490536).

8378407452664 is a wasteful number, since it uses less digits than its factorization.

8378407452664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64836903 (or 64836899 counting only the distinct ones).

The product of its (nonzero) digits is 216760320, while the sum is 64.

The spelling of 8378407452664 in words is "eight trillion, three hundred seventy-eight billion, four hundred seven million, four hundred fifty-two thousand, six hundred sixty-four".