16380372861 has 12 divisors (see below), whose sum is σ = 23684918400. Its totient is φ = 10908996360.

The previous prime is 16380372857. The next prime is 16380372881. The reversal of 16380372861 is 16827308361.

16380372861 is a `hidden beast` number, since 1 + 638 + 0 + 3 + 7 + 2 + 8 + 6 + 1 = 666.

It is not a de Polignac number, because 16380372861 - 2² = 16380372857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16380372821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 928461 + ... + 945938.

It is an arithmetic number, because the mean of its divisors is an integer number (1973743200).

Almost surely, 2^16380372861 is an apocalyptic number.

It is an amenable number.

16380372861 is a deficient number, since it is larger than the sum of its proper divisors (7304545539).

16380372861 is a wasteful number, since it uses less digits than its factorization.

16380372861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875376 (or 1875373 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 16380372861 in words is "sixteen billion, three hundred eighty million, three hundred seventy-two thousand, eight hundred sixty-one".