61959039576 has 128 divisors (see below), whose sum is σ = 184790937600. Its totient is φ = 16938915840.

The previous prime is 61959039557. The next prime is 61959039581. The reversal of 61959039576 is 67593095916.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 396676 + ... + 530348.

It is an arithmetic number, because the mean of its divisors is an integer number (1443679200).

Almost surely, 2^61959039576 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61959039576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92395468800).

61959039576 is an abundant number, since it is smaller than the sum of its proper divisors (122831898024).

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

61959039576 is a wasteful number, since it uses less digits than its factorization.

61959039576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133809 (or 133805 counting only the distinct ones).

The product of its (nonzero) digits is 13778100, while the sum is 60.

The spelling of 61959039576 in words is "sixty-one billion, nine hundred fifty-nine million, thirty-nine thousand, five hundred seventy-six".