61808994950 has 24 divisors (see below), whose sum is σ = 115033768320. Its totient is φ = 24708751200.

The previous prime is 61808994931. The next prime is 61808994979. The reversal of 61808994950 is 5949980816.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 61808994950.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 286886 + ... + 453785.

It is an arithmetic number, because the mean of its divisors is an integer number (4793073680).

Almost surely, 2^61808994950 is an apocalyptic number.

61808994950 is a deficient number, since it is larger than the sum of its proper divisors (53224773370).

61808994950 is a wasteful number, since it uses less digits than its factorization.

61808994950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742352 (or 742347 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 59.

The spelling of 61808994950 in words is "sixty-one billion, eight hundred eight million, nine hundred ninety-four thousand, nine hundred fifty".