61800345366 has 16 divisors (see below), whose sum is σ = 123956892864. Its totient is φ = 20540748104.

The previous prime is 61800345323. The next prime is 61800345391. The reversal of 61800345366 is 66354300816.

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, 14839500 + ... + 14843663.

It is an arithmetic number, because the mean of its divisors is an integer number (7747305804).

Almost surely, 2^61800345366 is an apocalyptic number.

61800345366 is an abundant number, since it is smaller than the sum of its proper divisors (62156547498).

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

61800345366 is a wasteful number, since it uses less digits than its factorization.

61800345366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29683515.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 61800345366 in words is "sixty-one billion, eight hundred million, three hundred forty-five thousand, three hundred sixty-six".