378815253531 has 16 divisors (see below), whose sum is σ = 593388929280. Its totient is φ = 211924617120.

The previous prime is 378815253473. The next prime is 378815253533. The reversal of 378815253531 is 135352518873.

It is not a de Polignac number, because 378815253531 - 2⁷ = 378815253403 is a prime.

It is a super-2 number, since 2×378815253531² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (378815253533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441509191 + ... + 441510048.

It is an arithmetic number, because the mean of its divisors is an integer number (37086808080).

Almost surely, 2^378815253531 is an apocalyptic number.

378815253531 is a deficient number, since it is larger than the sum of its proper divisors (214573675749).

378815253531 is a wasteful number, since it uses less digits than its factorization.

378815253531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883019266.

The product of its digits is 3024000, while the sum is 51.

The spelling of 378815253531 in words is "three hundred seventy-eight billion, eight hundred fifteen million, two hundred fifty-three thousand, five hundred thirty-one".