61558871 has 12 divisors (see below), whose sum is σ = 67976832. Its totient is φ = 55704000.

The previous prime is 61558831. The next prime is 61558873. The reversal of 61558871 is 17885516.

It is not a de Polignac number, because 61558871 - 2¹⁸ = 61296727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61558873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28106 + ... + 30216.

It is an arithmetic number, because the mean of its divisors is an integer number (5664736).

Almost surely, 2^61558871 is an apocalyptic number.

61558871 is a deficient number, since it is larger than the sum of its proper divisors (6417961).

61558871 is a wasteful number, since it uses less digits than its factorization.

61558871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374 (or 2363 counting only the distinct ones).

The product of its digits is 67200, while the sum is 41.

The square root of 61558871 is about 7845.9461507201. The cubic root of 61558871 is about 394.8482480682.

The spelling of 61558871 in words is "sixty-one million, five hundred fifty-eight thousand, eight hundred seventy-one".