61299844144 has 40 divisors (see below), whose sum is σ = 148074951168. Its totient is φ = 23883055680.

The previous prime is 61299844063. The next prime is 61299844157. The reversal of 61299844144 is 44144899216.

It is a junction number, because it is equal to n+sod(n) for n = 61299844091 and 61299844100.

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, 24876952 + ... + 24879415.

Almost surely, 2^61299844144 is an apocalyptic number.

It is an amenable number.

61299844144 is an abundant number, since it is smaller than the sum of its proper divisors (86775107024).

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

61299844144 is a wasteful number, since it uses less digits than its factorization.

61299844144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49756393 (or 49756387 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 52.

The spelling of 61299844144 in words is "sixty-one billion, two hundred ninety-nine million, eight hundred forty-four thousand, one hundred forty-four".