61880711664 has 40 divisors (see below), whose sum is σ = 161008583680. Its totient is φ = 20478506688.

The previous prime is 61880711611. The next prime is 61880711701. The reversal of 61880711664 is 46611708816.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4630672 + ... + 4644015.

It is an arithmetic number, because the mean of its divisors is an integer number (4025214592).

Almost surely, 2^61880711664 is an apocalyptic number.

It is an amenable number.

61880711664 is an abundant number, since it is smaller than the sum of its proper divisors (99127872016).

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

61880711664 is a wasteful number, since it uses less digits than its factorization.

61880711664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9274837 (or 9274831 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 61880711664 in words is "sixty-one billion, eight hundred eighty million, seven hundred eleven thousand, six hundred sixty-four".