378853733646 has 48 divisors (see below), whose sum is σ = 833248587600. Its totient is φ = 124377732864.

The previous prime is 378853733641. The next prime is 378853733681. The reversal of 378853733646 is 646337358873.

378853733646 is a `hidden beast` number, since 3 + 7 + 8 + 8 + 537 + 33 + 64 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378853733641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7680550 + ... + 7729718.

It is an arithmetic number, because the mean of its divisors is an integer number (17359345575).

Almost surely, 2^378853733646 is an apocalyptic number.

378853733646 is an abundant number, since it is smaller than the sum of its proper divisors (454394853954).

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

378853733646 is a wasteful number, since it uses less digits than its factorization.

378853733646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55633 (or 55630 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 63.

The spelling of 378853733646 in words is "three hundred seventy-eight billion, eight hundred fifty-three million, seven hundred thirty-three thousand, six hundred forty-six".