61640300164 has 48 divisors (see below), whose sum is σ = 111303181696. Its totient is φ = 29857766400.

The previous prime is 61640300131. The next prime is 61640300167. The reversal of 61640300164 is 46100304616.

It is not an unprimeable number, because it can be changed into a prime (61640300167) 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, 4987777 + ... + 5000119.

Almost surely, 2^61640300164 is an apocalyptic number.

It is an amenable number.

61640300164 is a deficient number, since it is larger than the sum of its proper divisors (49662881532).

61640300164 is a wasteful number, since it uses less digits than its factorization.

61640300164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12716 (or 12714 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 61640300164 in words is "sixty-one billion, six hundred forty million, three hundred thousand, one hundred sixty-four".