61566427359280 has 40 divisors (see below), whose sum is σ = 143142327478800. Its totient is φ = 24626504901888.

The previous prime is 61566427359271. The next prime is 61566427359313. The reversal of 61566427359280 is 8295372466516.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38295486 + ... + 39870754.

It is an arithmetic number, because the mean of its divisors is an integer number (3578558186970).

It is a 1-persistent number, because it is pandigital, but 2⋅61566427359280 = 123132854718560 is not.

Almost surely, 2^{61566427359280} is an apocalyptic number.

It is an amenable number.

61566427359280 is an abundant number, since it is smaller than the sum of its proper divisors (81575900119520).

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

61566427359280 is a wasteful number, since it uses less digits than its factorization.

61566427359280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063821 (or 2063815 counting only the distinct ones).

The product of its (nonzero) digits is 130636800, while the sum is 64.

The spelling of 61566427359280 in words is "sixty-one trillion, five hundred sixty-six billion, four hundred twenty-seven million, three hundred fifty-nine thousand, two hundred eighty".