61710131552538 has 128 divisors (see below), whose sum is σ = 145504242100224. Its totient is φ = 17081109964800.

The previous prime is 61710131552527. The next prime is 61710131552603. The reversal of 61710131552538 is 83525513101716.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 326343298 + ... + 326532338.

It is an arithmetic number, because the mean of its divisors is an integer number (1136751891408).

Almost surely, 2^{61710131552538} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61710131552538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72752121050112).

61710131552538 is an abundant number, since it is smaller than the sum of its proper divisors (83794110547686).

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

61710131552538 is a wasteful number, since it uses less digits than its factorization.

61710131552538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190420.

The product of its (nonzero) digits is 756000, while the sum is 48.

The spelling of 61710131552538 in words is "sixty-one trillion, seven hundred ten billion, one hundred thirty-one million, five hundred fifty-two thousand, five hundred thirty-eight".