61477809180 has 48 divisors (see below), whose sum is σ = 173842218144. Its totient is φ = 16231763200.

The previous prime is 61477809179. The next prime is 61477809181. The reversal of 61477809180 is 8190877416.

It is an interprime number because it is at equal distance from previous prime (61477809179) and next prime (61477809181).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61477809181) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5066367 + ... + 5078486.

It is an arithmetic number, because the mean of its divisors is an integer number (3621712878).

Almost surely, 2^61477809180 is an apocalyptic number.

61477809180 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61477809180 is an abundant number, since it is smaller than the sum of its proper divisors (112364408964).

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

61477809180 is a wasteful number, since it uses less digits than its factorization.

61477809180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10144966 (or 10144964 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 51.

The spelling of 61477809180 in words is "sixty-one billion, four hundred seventy-seven million, eight hundred nine thousand, one hundred eighty".