61732880664 has 64 divisors (see below), whose sum is σ = 189947331840. Its totient is φ = 16281198720.

The previous prime is 61732880663. The next prime is 61732880669. The reversal of 61732880664 is 46608823716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61732880663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14130802 + ... + 14135169.

It is an arithmetic number, because the mean of its divisors is an integer number (2967927060).

Almost surely, 2^61732880664 is an apocalyptic number.

It is an amenable number.

61732880664 is an abundant number, since it is smaller than the sum of its proper divisors (128214451176).

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

61732880664 is a wasteful number, since it uses less digits than its factorization.

61732880664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28266000 (or 28265996 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 51.

The spelling of 61732880664 in words is "sixty-one billion, seven hundred thirty-two million, eight hundred eighty thousand, six hundred sixty-four".