61413971680 has 24 divisors (see below), whose sum is σ = 145090508472. Its totient is φ = 24565588608.

The previous prime is 61413971603. The next prime is 61413971687. The reversal of 61413971680 is 8617931416.

61413971680 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 61413971680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61413971687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191918502 + ... + 191918821.

It is an arithmetic number, because the mean of its divisors is an integer number (6045437853).

Almost surely, 2^61413971680 is an apocalyptic number.

It is an amenable number.

61413971680 is an abundant number, since it is smaller than the sum of its proper divisors (83676536792).

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

61413971680 is a wasteful number, since it uses less digits than its factorization.

61413971680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383837338 (or 383837330 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 61413971680 in words is "sixty-one billion, four hundred thirteen million, nine hundred seventy-one thousand, six hundred eighty".