155843704431 has 12 divisors (see below), whose sum is σ = 233444890952. Its totient is φ = 103895802792.

The previous prime is 155843704399. The next prime is 155843704439. The reversal of 155843704431 is 134407348551.

155843704431 is a `hidden beast` number, since 1 + 5 + 584 + 37 + 0 + 4 + 4 + 31 = 666.

It is not a de Polignac number, because 155843704431 - 2⁵ = 155843704399 is a prime.

It is a super-2 number, since 2×155843704431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155843704439) 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, 320665816 + ... + 320666301.

Almost surely, 2^155843704431 is an apocalyptic number.

155843704431 is a deficient number, since it is larger than the sum of its proper divisors (77601186521).

155843704431 is an frugal number, since it uses more digits than its factorization.

155843704431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641332132 (or 641332120 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 155843704431 in words is "one hundred fifty-five billion, eight hundred forty-three million, seven hundred four thousand, four hundred thirty-one".