61328399646140 has 48 divisors (see below), whose sum is σ = 140629217994720. Its totient is φ = 22280374375680.

The previous prime is 61328399646131. The next prime is 61328399646179. The reversal of 61328399646140 is 4164699382316.

It is a super-2 number, since 2×61328399646140² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 130150907 + ... + 130621266.

It is an arithmetic number, because the mean of its divisors is an integer number (2929775374890).

Almost surely, 2^{61328399646140} is an apocalyptic number.

It is an amenable number.

61328399646140 is an abundant number, since it is smaller than the sum of its proper divisors (79300818348580).

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

61328399646140 is a wasteful number, since it uses less digits than its factorization.

61328399646140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260773262 (or 260773260 counting only the distinct ones).

The product of its (nonzero) digits is 40310784, while the sum is 62.

The spelling of 61328399646140 in words is "sixty-one trillion, three hundred twenty-eight billion, three hundred ninety-nine million, six hundred forty-six thousand, one hundred forty".