61118637646 has 16 divisors (see below), whose sum is σ = 100238093568. Its totient is φ = 27718483000.

The previous prime is 61118637623. The next prime is 61118637653. The reversal of 61118637646 is 64673681116.

It is a self number, because there is not a number n which added to its sum of digits gives 61118637646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3125830 + ... + 3145321.

It is an arithmetic number, because the mean of its divisors is an integer number (6264880848).

Almost surely, 2^61118637646 is an apocalyptic number.

61118637646 is a deficient number, since it is larger than the sum of its proper divisors (39119455922).

61118637646 is a wasteful number, since it uses less digits than its factorization.

61118637646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6271607.

The product of its digits is 870912, while the sum is 49.

The spelling of 61118637646 in words is "sixty-one billion, one hundred eighteen million, six hundred thirty-seven thousand, six hundred forty-six".