61658767968 has 96 divisors (see below), whose sum is σ = 185023883520. Its totient is φ = 17612259840.

The previous prime is 61658767957. The next prime is 61658767969. The reversal of 61658767968 is 86976785616.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61658767969) 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, 3289503 + ... + 3308193.

It is an arithmetic number, because the mean of its divisors is an integer number (1927332120).

Almost surely, 2^61658767968 is an apocalyptic number.

It is an amenable number.

61658767968 is an abundant number, since it is smaller than the sum of its proper divisors (123365115552).

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

61658767968 is a wasteful number, since it uses less digits than its factorization.

61658767968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23620 (or 23612 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 69.

The spelling of 61658767968 in words is "sixty-one billion, six hundred fifty-eight million, seven hundred sixty-seven thousand, nine hundred sixty-eight".