61310553685 has 16 divisors (see below), whose sum is σ = 74375074800. Its totient is φ = 48514470400.

The previous prime is 61310553679. The next prime is 61310553701. The reversal of 61310553685 is 58635501316.

61310553685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 3355769041 + 57954784644 = 57929^2 + 240738^2 .

It is not a de Polignac number, because 61310553685 - 2⁹ = 61310553173 is a prime.

It is a super-2 number, since 2×61310553685² (a number of 22 digits) contains 22 as substring.

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, 451641 + ... + 571489.

It is an arithmetic number, because the mean of its divisors is an integer number (4648442175).

Almost surely, 2^61310553685 is an apocalyptic number.

It is an amenable number.

61310553685 is a deficient number, since it is larger than the sum of its proper divisors (13064521115).

61310553685 is a wasteful number, since it uses less digits than its factorization.

61310553685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120968.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 61310553685 in words is "sixty-one billion, three hundred ten million, five hundred fifty-three thousand, six hundred eighty-five".