61556084742 has 32 divisors (see below), whose sum is σ = 126465011712. Its totient is φ = 19960111584.

The previous prime is 61556084731. The next prime is 61556084749. The reversal of 61556084742 is 24748065516.

It is a junction number, because it is equal to n+sod(n) for n = 61556084691 and 61556084700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61556084749) 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, 1196473 + ... + 1246859.

It is an arithmetic number, because the mean of its divisors is an integer number (3952031616).

Almost surely, 2^61556084742 is an apocalyptic number.

61556084742 is an abundant number, since it is smaller than the sum of its proper divisors (64908926970).

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

61556084742 is a wasteful number, since it uses less digits than its factorization.

61556084742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55932.

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 61556084742 in words is "sixty-one billion, five hundred fifty-six million, eighty-four thousand, seven hundred forty-two".