61059077880 has 64 divisors (see below), whose sum is σ = 185495961600. Its totient is φ = 16076311680.

The previous prime is 61059077879. The next prime is 61059077887. The reversal of 61059077880 is 8877095016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61059077887) 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, 3210936 + ... + 3229895.

It is an arithmetic number, because the mean of its divisors is an integer number (2898374400).

Almost surely, 2^61059077880 is an apocalyptic number.

61059077880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61059077880 is an abundant number, since it is smaller than the sum of its proper divisors (124436883720).

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

61059077880 is a wasteful number, since it uses less digits than its factorization.

61059077880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6440924 (or 6440920 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 51.

The spelling of 61059077880 in words is "sixty-one billion, fifty-nine million, seventy-seven thousand, eight hundred eighty".