61498418660 has 24 divisors (see below), whose sum is σ = 147596205120. Its totient is φ = 21085172064.

The previous prime is 61498418627. The next prime is 61498418677. The reversal of 61498418660 is 6681489416.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219637070 + ... + 219637349.

It is an arithmetic number, because the mean of its divisors is an integer number (6149841880).

Almost surely, 2^61498418660 is an apocalyptic number.

It is an amenable number.

61498418660 is an abundant number, since it is smaller than the sum of its proper divisors (86097786460).

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

61498418660 is a wasteful number, since it uses less digits than its factorization.

61498418660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439274435 (or 439274433 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 61498418660 in words is "sixty-one billion, four hundred ninety-eight million, four hundred eighteen thousand, six hundred sixty".