61695891 has 16 divisors (see below), whose sum is σ = 92104320. Its totient is φ = 40814280.

The previous prime is 61695863. The next prime is 61695899. The reversal of 61695891 is 19859616.

61695891 is a `hidden beast` number, since 6 + 1 + 69 + 589 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-61695891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61695899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5185 + ... + 12258.

It is an arithmetic number, because the mean of its divisors is an integer number (5756520).

Almost surely, 2^61695891 is an apocalyptic number.

61695891 is a deficient number, since it is larger than the sum of its proper divisors (30408429).

61695891 is a wasteful number, since it uses less digits than its factorization.

61695891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17583 (or 17577 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 61695891 is about 7854.6731949840. The cubic root of 61695891 is about 395.1409868987.

The spelling of 61695891 in words is "sixty-one million, six hundred ninety-five thousand, eight hundred ninety-one".