61715871 has 16 divisors (see below), whose sum is σ = 104492800. Its totient is φ = 35266104.

The previous prime is 61715869. The next prime is 61715873. The reversal of 61715871 is 17851716.

It is a happy number.

61715871 is a `hidden beast` number, since 6 + 1 + 71 + 587 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (61715869) and next prime (61715873).

It is not a de Polignac number, because 61715871 - 2¹ = 61715869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61715873) 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, 163081 + ... + 163458.

It is an arithmetic number, because the mean of its divisors is an integer number (6530800).

Almost surely, 2^61715871 is an apocalyptic number.

61715871 is a deficient number, since it is larger than the sum of its proper divisors (42776929).

61715871 is a wasteful number, since it uses less digits than its factorization.

61715871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326555 (or 326549 counting only the distinct ones).

The product of its digits is 11760, while the sum is 36.

The square root of 61715871 is about 7855.9449463448. The cubic root of 61715871 is about 395.1836373070.

The spelling of 61715871 in words is "sixty-one million, seven hundred fifteen thousand, eight hundred seventy-one".