61231747968 has 48 divisors (see below), whose sum is σ = 176200736400. Its totient is φ = 20410582272.

The previous prime is 61231747961. The next prime is 61231748059. The reversal of 61231747968 is 86974713216.

61231747968 is a `hidden beast` number, since 612 + 3 + 17 + 4 + 7 + 9 + 6 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61231747961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26575128 + ... + 26577431.

It is an arithmetic number, because the mean of its divisors is an integer number (3670848675).

Almost surely, 2^61231747968 is an apocalyptic number.

It is an amenable number.

61231747968 is an abundant number, since it is smaller than the sum of its proper divisors (114968988432).

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

61231747968 is a wasteful number, since it uses less digits than its factorization.

61231747968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53152579 (or 53152564 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The spelling of 61231747968 in words is "sixty-one billion, two hundred thirty-one million, seven hundred forty-seven thousand, nine hundred sixty-eight".