52861957191 has 24 divisors (see below), whose sum is σ = 76632192000. Its totient is φ = 35114116752.

The previous prime is 52861957177. The next prime is 52861957193. The reversal of 52861957191 is 19175916825.

It is a happy number.

52861957191 is a `hidden beast` number, since 5 + 2 + 8 + 61 + 9 + 571 + 9 + 1 = 666.

52861957191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-52861957191 is a prime.

It is a super-2 number, since 2×52861957191² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52861957193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3231130 + ... + 3247448.

It is an arithmetic number, because the mean of its divisors is an integer number (3193008000).

Almost surely, 2^52861957191 is an apocalyptic number.

52861957191 is a deficient number, since it is larger than the sum of its proper divisors (23770234809).

52861957191 is a wasteful number, since it uses less digits than its factorization.

52861957191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17603 (or 17600 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 54.

The spelling of 52861957191 in words is "fifty-two billion, eight hundred sixty-one million, nine hundred fifty-seven thousand, one hundred ninety-one".