61695525661 has 16 divisors (see below), whose sum is σ = 76940235648. Its totient is φ = 48061224000.

The previous prime is 61695525649. The next prime is 61695525691. The reversal of 61695525661 is 16652559616.

It is a cyclic number.

It is not a de Polignac number, because 61695525661 - 2²⁵ = 61661971229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61695525599 and 61695525608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61695525691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176731 + ... + 393223.

It is an arithmetic number, because the mean of its divisors is an integer number (4808764728).

Almost surely, 2^61695525661 is an apocalyptic number.

It is an amenable number.

61695525661 is a deficient number, since it is larger than the sum of its proper divisors (15244709987).

61695525661 is a wasteful number, since it uses less digits than its factorization.

61695525661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220212.

The product of its digits is 2916000, while the sum is 52.

The spelling of 61695525661 in words is "sixty-one billion, six hundred ninety-five million, five hundred twenty-five thousand, six hundred sixty-one".