61331660405268 has 48 divisors (see below), whose sum is σ = 157346221154304. Its totient is φ = 18439010281440.

The previous prime is 61331660405243. The next prime is 61331660405371. The reversal of 61331660405268 is 86250406613316.

It is a self number, because there is not a number n which added to its sum of digits gives 61331660405268.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1829250130 + ... + 1829283657.

It is an arithmetic number, because the mean of its divisors is an integer number (3278046274048).

Almost surely, 2^{61331660405268} is an apocalyptic number.

It is an amenable number.

61331660405268 is an abundant number, since it is smaller than the sum of its proper divisors (96014560749036).

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

61331660405268 is a wasteful number, since it uses less digits than its factorization.

61331660405268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3658533932 (or 3658533930 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 51.

The spelling of 61331660405268 in words is "sixty-one trillion, three hundred thirty-one billion, six hundred sixty million, four hundred five thousand, two hundred sixty-eight".