259949989431 has 48 divisors (see below), whose sum is σ = 424652492160. Its totient is φ = 151786340160.

The previous prime is 259949989427. The next prime is 259949989471. The reversal of 259949989431 is 134989949952.

259949989431 is a `hidden beast` number, since 2 + 5 + 99 + 499 + 8 + 9 + 43 + 1 = 666.

259949989431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 259949989431 - 2² = 259949989427 is a prime.

It is a super-2 number, since 2×259949989431² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 259949989431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259949989471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1243816 + ... + 1437698.

It is an arithmetic number, because the mean of its divisors is an integer number (8846926920).

Almost surely, 2^259949989431 is an apocalyptic number.

259949989431 is a deficient number, since it is larger than the sum of its proper divisors (164702502729).

259949989431 is a wasteful number, since it uses less digits than its factorization.

259949989431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194396 (or 194393 counting only the distinct ones).

The product of its digits is 226748160, while the sum is 72.

The spelling of 259949989431 in words is "two hundred fifty-nine billion, nine hundred forty-nine million, nine hundred eighty-nine thousand, four hundred thirty-one".