61310553620 has 48 divisors (see below), whose sum is σ = 129177296640. Its totient is φ = 24443385216.

The previous prime is 61310553613. The next prime is 61310553641. The reversal of 61310553620 is 2635501316.

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, 8092154 + ... + 8099726.

It is an arithmetic number, because the mean of its divisors is an integer number (2691193680).

Almost surely, 2^61310553620 is an apocalyptic number.

It is an amenable number.

61310553620 is an abundant number, since it is smaller than the sum of its proper divisors (67866743020).

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

61310553620 is a wasteful number, since it uses less digits than its factorization.

61310553620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8864 (or 8862 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The spelling of 61310553620 in words is "sixty-one billion, three hundred ten million, five hundred fifty-three thousand, six hundred twenty".