61081521827344 has 20 divisors (see below), whose sum is σ = 118538508018796. Its totient is φ = 30490939112832.

The previous prime is 61081521827311. The next prime is 61081521827369. The reversal of 61081521827344 is 44372812518016.

It can be written as a sum of positive squares in 2 ways, for example, as 8630786352400 + 52450735474944 = 2937820^2 + 7242288^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61081521827291 and 61081521827300.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3113852439 + ... + 3113872054.

Almost surely, 2^{61081521827344} is an apocalyptic number.

It is an amenable number.

61081521827344 is a deficient number, since it is larger than the sum of its proper divisors (57456986191452).

61081521827344 is a wasteful number, since it uses less digits than its factorization.

61081521827344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6227725114 (or 6227725108 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 52.

The spelling of 61081521827344 in words is "sixty-one trillion, eighty-one billion, five hundred twenty-one million, eight hundred twenty-seven thousand, three hundred forty-four".