50781764218 has 32 divisors (see below), whose sum is σ = 80520917760. Its totient is φ = 23991888960.

The previous prime is 50781764213. The next prime is 50781764233. The reversal of 50781764218 is 81246718705.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (50781764213) 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, 285405 + ... + 427807.

It is an arithmetic number, because the mean of its divisors is an integer number (2516278680).

Almost surely, 2^50781764218 is an apocalyptic number.

50781764218 is a deficient number, since it is larger than the sum of its proper divisors (29739153542).

50781764218 is a wasteful number, since it uses less digits than its factorization.

50781764218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142582.

The product of its (nonzero) digits is 752640, while the sum is 49.

The spelling of 50781764218 in words is "fifty billion, seven hundred eighty-one million, seven hundred sixty-four thousand, two hundred eighteen".