61057528361 has 4 divisors (see below), whose sum is σ = 62209557252. Its totient is φ = 59905499472.

The previous prime is 61057528351. The next prime is 61057528373. The reversal of 61057528361 is 16382575016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27537411136 + 33520117225 = 165944^2 + 183085^2 .

It is a cyclic number.

It is not a de Polignac number, because 61057528361 - 2²² = 61053334057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61057528351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576014366 + ... + 576014471.

It is an arithmetic number, because the mean of its divisors is an integer number (15552389313).

Almost surely, 2^61057528361 is an apocalyptic number.

It is an amenable number.

61057528361 is a deficient number, since it is larger than the sum of its proper divisors (1152028891).

61057528361 is a wasteful number, since it uses less digits than its factorization.

61057528361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152028890.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 61057528361 in words is "sixty-one billion, fifty-seven million, five hundred twenty-eight thousand, three hundred sixty-one".