69861137431 has 4 divisors (see below), whose sum is σ = 72270142200. Its totient is φ = 67452132664.

The previous prime is 69861137419. The next prime is 69861137453. The reversal of 69861137431 is 13473116896.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 69861137431 - 2⁵ = 69861137399 is a prime.

It is a super-2 number, since 2×69861137431² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69861135431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1204502341 + ... + 1204502398.

It is an arithmetic number, because the mean of its divisors is an integer number (18067535550).

Almost surely, 2^69861137431 is an apocalyptic number.

69861137431 is a deficient number, since it is larger than the sum of its proper divisors (2409004769).

69861137431 is a wasteful number, since it uses less digits than its factorization.

69861137431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409004768.

The product of its digits is 653184, while the sum is 49.

The spelling of 69861137431 in words is "sixty-nine billion, eight hundred sixty-one million, one hundred thirty-seven thousand, four hundred thirty-one".