61513644236 has 48 divisors (see below), whose sum is σ = 117797729280. Its totient is φ = 27874566720.

The previous prime is 61513644223. The next prime is 61513644277. The reversal of 61513644236 is 63244631516.

It is a junction number, because it is equal to n+sod(n) for n = 61513644193 and 61513644202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34969925 + ... + 34971683.

It is an arithmetic number, because the mean of its divisors is an integer number (2454119360).

Almost surely, 2^61513644236 is an apocalyptic number.

It is an amenable number.

61513644236 is a deficient number, since it is larger than the sum of its proper divisors (56284085044).

61513644236 is a wasteful number, since it uses less digits than its factorization.

61513644236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3774 (or 3772 counting only the distinct ones).

The product of its digits is 311040, while the sum is 41.

The spelling of 61513644236 in words is "sixty-one billion, five hundred thirteen million, six hundred forty-four thousand, two hundred thirty-six".