50640215787 has 36 divisors (see below), whose sum is σ = 83922833904. Its totient is φ = 28824757920.

The previous prime is 50640215783. The next prime is 50640215803. The reversal of 50640215787 is 78751204605.

50640215787 is a `hidden beast` number, since 50 + 6 + 4 + 0 + 21 + 578 + 7 = 666.

It is not a de Polignac number, because 50640215787 - 2² = 50640215783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50640215783) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4351837 + ... + 4363457.

Almost surely, 2^50640215787 is an apocalyptic number.

50640215787 is a deficient number, since it is larger than the sum of its proper divisors (33282618117).

50640215787 is a wasteful number, since it uses less digits than its factorization.

50640215787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12160 (or 11894 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 50640215787 in words is "fifty billion, six hundred forty million, two hundred fifteen thousand, seven hundred eighty-seven".