61501511600 has 60 divisors (see below), whose sum is σ = 150901201824. Its totient is φ = 24077180160.

The previous prime is 61501511593. The next prime is 61501511623. The reversal of 61501511600 is 611510516.

61501511600 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 61501511600.

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, 1616879 + ... + 1654478.

Almost surely, 2^61501511600 is an apocalyptic number.

It is an amenable number.

61501511600 is an abundant number, since it is smaller than the sum of its proper divisors (89399690224).

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

61501511600 is a wasteful number, since it uses less digits than its factorization.

61501511600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3271422 (or 3271411 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 61501511600 in words is "sixty-one billion, five hundred one million, five hundred eleven thousand, six hundred".