61695525691 has 2 divisors, whose sum is σ = 61695525692. Its totient is φ = 61695525690.

The previous prime is 61695525649. The next prime is 61695525751. The reversal of 61695525691 is 19652559616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61695525691 - 2¹⁷ = 61695394619 is a prime.

It is not a weakly prime, because it can be changed into another prime (61695525191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30847762845 + 30847762846.

It is an arithmetic number, because the mean of its divisors is an integer number (30847762846).

Almost surely, 2^61695525691 is an apocalyptic number.

61695525691 is a deficient number, since it is larger than the sum of its proper divisors (1).

61695525691 is an equidigital number, since it uses as much as digits as its factorization.

61695525691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4374000, while the sum is 55.

The spelling of 61695525691 in words is "sixty-one billion, six hundred ninety-five million, five hundred twenty-five thousand, six hundred ninety-one".