61956355584 has 80 divisors (see below), whose sum is σ = 169081521840. Its totient is φ = 20148387840.

The previous prime is 61956355541. The next prime is 61956355607. The reversal of 61956355584 is 48555365916.

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, 428929 + ... + 554880.

It is an arithmetic number, because the mean of its divisors is an integer number (2113519023).

Almost surely, 2^61956355584 is an apocalyptic number.

61956355584 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

61956355584 is an abundant number, since it is smaller than the sum of its proper divisors (107125166256).

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

61956355584 is an equidigital number, since it uses as much as digits as its factorization.

61956355584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983871 (or 983855 counting only the distinct ones).

The product of its digits is 19440000, while the sum is 57.

The spelling of 61956355584 in words is "sixty-one billion, nine hundred fifty-six million, three hundred fifty-five thousand, five hundred eighty-four".