61576636285 has 4 divisors (see below), whose sum is σ = 73891963548. Its totient is φ = 49261309024.

The previous prime is 61576636283. The next prime is 61576636313. The reversal of 61576636285 is 58263667516.

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 19565575129 + 42011061156 = 139877^2 + 204966^2 .

It is a cyclic number.

It is not a de Polignac number, because 61576636285 - 2¹ = 61576636283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61576636283) 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, 6157663624 + ... + 6157663633.

It is an arithmetic number, because the mean of its divisors is an integer number (18472990887).

Almost surely, 2^61576636285 is an apocalyptic number.

It is an amenable number.

61576636285 is a deficient number, since it is larger than the sum of its proper divisors (12315327263).

61576636285 is a wasteful number, since it uses less digits than its factorization.

61576636285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12315327262.

The product of its digits is 10886400, while the sum is 55.

The spelling of 61576636285 in words is "sixty-one billion, five hundred seventy-six million, six hundred thirty-six thousand, two hundred eighty-five".