381625720686 has 72 divisors (see below), whose sum is σ = 978155301240. Its totient is φ = 107187839136.

The previous prime is 381625720681. The next prime is 381625720699. The reversal of 381625720686 is 686027526183.

381625720686 is a `hidden beast` number, since 3 + 8 + 1 + 6 + 2 + 572 + 0 + 68 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381625720681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3614761 + ... + 3718836.

It is an arithmetic number, because the mean of its divisors is an integer number (13585490295).

Almost surely, 2^381625720686 is an apocalyptic number.

381625720686 is an abundant number, since it is smaller than the sum of its proper divisors (596529580554).

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

381625720686 is a wasteful number, since it uses less digits than its factorization.

381625720686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7333678 (or 7333668 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 381625720686 in words is "three hundred eighty-one billion, six hundred twenty-five million, seven hundred twenty thousand, six hundred eighty-six".