61323209180 has 24 divisors (see below), whose sum is σ = 133219386720. Its totient is φ = 23683446080.

The previous prime is 61323209159. The next prime is 61323209191. The reversal of 61323209180 is 8190232316.

It is a self number, because there is not a number n which added to its sum of digits gives 61323209180.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52864256 + ... + 52865415.

It is an arithmetic number, because the mean of its divisors is an integer number (5550807780).

Almost surely, 2^61323209180 is an apocalyptic number.

It is an amenable number.

61323209180 is an abundant number, since it is smaller than the sum of its proper divisors (71896177540).

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

61323209180 is a wasteful number, since it uses less digits than its factorization.

61323209180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105729709 (or 105729707 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 61323209180 in words is "sixty-one billion, three hundred twenty-three million, two hundred nine thousand, one hundred eighty".