61331661424572 has 96 divisors (see below), whose sum is σ = 178451305611264. Its totient is φ = 15927451051200.

The previous prime is 61331661424571. The next prime is 61331661424603. The reversal of 61331661424572 is 27542416613316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61331661424571) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 769908 + ... + 11102075.

It is an arithmetic number, because the mean of its divisors is an integer number (1858867766784).

Almost surely, 2^{61331661424572} is an apocalyptic number.

It is an amenable number.

61331661424572 is an abundant number, since it is smaller than the sum of its proper divisors (117119644186692).

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

61331661424572 is a wasteful number, since it uses less digits than its factorization.

61331661424572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11877599 (or 11877597 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 51.

The spelling of 61331661424572 in words is "sixty-one trillion, three hundred thirty-one billion, six hundred sixty-one million, four hundred twenty-four thousand, five hundred seventy-two".