387068919921 has 40 divisors (see below), whose sum is σ = 597069462528. Its totient is φ = 249636816000.

The previous prime is 387068919907. The next prime is 387068920067. The reversal of 387068919921 is 129919860783.

387068919921 is a `hidden beast` number, since 387 + 0 + 68 + 9 + 199 + 2 + 1 = 666.

It is not a de Polignac number, because 387068919921 - 2¹³ = 387068911729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (387068919121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7812136 + ... + 7861526.

Almost surely, 2^387068919921 is an apocalyptic number.

387068919921 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

387068919921 is a deficient number, since it is larger than the sum of its proper divisors (210000542607).

387068919921 is a wasteful number, since it uses less digits than its factorization.

387068919921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52555 (or 52546 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 63.

The spelling of 387068919921 in words is "three hundred eighty-seven billion, sixty-eight million, nine hundred nineteen thousand, nine hundred twenty-one".