61265657 has 2 divisors, whose sum is σ = 61265658. Its totient is φ = 61265656.

The previous prime is 61265651. The next prime is 61265693. The reversal of 61265657 is 75656216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49266361 + 11999296 = 7019^2 + 3464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61265657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61265657.

It is not a weakly prime, because it can be changed into another prime (61265651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30632828 + 30632829.

It is an arithmetic number, because the mean of its divisors is an integer number (30632829).

Almost surely, 2^61265657 is an apocalyptic number.

It is an amenable number.

61265657 is a deficient number, since it is larger than the sum of its proper divisors (1).

61265657 is an equidigital number, since it uses as much as digits as its factorization.

61265657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 61265657 is about 7827.2381463707. The cubic root of 61265657 is about 394.2203432233.

The spelling of 61265657 in words is "sixty-one million, two hundred sixty-five thousand, six hundred fifty-seven".