61201515400 has 48 divisors (see below), whose sum is σ = 142920473040. Its totient is φ = 24372744000.

The previous prime is 61201515383. The next prime is 61201515457. The reversal of 61201515400 is 451510216.

It is a happy number.

61201515400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 628626 + ... + 719425.

It is an arithmetic number, because the mean of its divisors is an integer number (2977509855).

Almost surely, 2^61201515400 is an apocalyptic number.

It is an amenable number.

61201515400 is an abundant number, since it is smaller than the sum of its proper divisors (81718957640).

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

61201515400 is a wasteful number, since it uses less digits than its factorization.

61201515400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348294 (or 1348285 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 61201515400 in words is "sixty-one billion, two hundred one million, five hundred fifteen thousand, four hundred".