61695561 has 8 divisors (see below), whose sum is σ = 82311040. Its totient is φ = 41105232.

The previous prime is 61695553. The next prime is 61695563. The reversal of 61695561 is 16559616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61695561 - 2³ = 61695553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61695563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480 + ... + 11118.

It is an arithmetic number, because the mean of its divisors is an integer number (10288880).

Almost surely, 2^61695561 is an apocalyptic number.

It is an amenable number.

61695561 is a deficient number, since it is larger than the sum of its proper divisors (20615479).

61695561 is a wasteful number, since it uses less digits than its factorization.

61695561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12575.

The product of its digits is 48600, while the sum is 39.

The square root of 61695561 is about 7854.6521883531. The cubic root of 61695561 is about 395.1402823852.

The spelling of 61695561 in words is "sixty-one million, six hundred ninety-five thousand, five hundred sixty-one".