61871057589 has 16 divisors (see below), whose sum is σ = 90002525760. Its totient is φ = 37494168960.

The previous prime is 61871057551. The next prime is 61871057593. The reversal of 61871057589 is 98575017816.

It is not a de Polignac number, because 61871057589 - 2⁹ = 61871057077 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61871057089) 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, 305539 + ... + 465935.

It is an arithmetic number, because the mean of its divisors is an integer number (5625157860).

Almost surely, 2^61871057589 is an apocalyptic number.

It is an amenable number.

61871057589 is a deficient number, since it is larger than the sum of its proper divisors (28131468171).

61871057589 is a wasteful number, since it uses less digits than its factorization.

61871057589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172100.

The product of its (nonzero) digits is 4233600, while the sum is 57.

The spelling of 61871057589 in words is "sixty-one billion, eight hundred seventy-one million, fifty-seven thousand, five hundred eighty-nine".