61796440494 has 24 divisors (see below), whose sum is σ = 134083316952. Its totient is φ = 20569424400.

The previous prime is 61796440481. The next prime is 61796440513. The reversal of 61796440494 is 49404469716.

61796440494 is a `hidden beast` number, since 6 + 179 + 64 + 404 + 9 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 61796440494.

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, 2436124 + ... + 2461359.

It is an arithmetic number, because the mean of its divisors is an integer number (5586804873).

Almost surely, 2^61796440494 is an apocalyptic number.

61796440494 is an abundant number, since it is smaller than the sum of its proper divisors (72286876458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61796440494 is a wasteful number, since it uses less digits than its factorization.

61796440494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4898192 (or 4898189 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 61796440494 in words is "sixty-one billion, seven hundred ninety-six million, four hundred forty thousand, four hundred ninety-four".