249654431379 has 16 divisors (see below), whose sum is σ = 352480062240. Its totient is φ = 156634030080.

The previous prime is 249654431371. The next prime is 249654431399. The reversal of 249654431379 is 973134456942.

It is not a de Polignac number, because 249654431379 - 2³ = 249654431371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (249654431371) 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, 518827 + ... + 876635.

It is an arithmetic number, because the mean of its divisors is an integer number (22030003890).

Almost surely, 2^249654431379 is an apocalyptic number.

249654431379 is a deficient number, since it is larger than the sum of its proper divisors (102825630861).

249654431379 is a wasteful number, since it uses less digits than its factorization.

249654431379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371510.

The product of its digits is 19595520, while the sum is 57.

The spelling of 249654431379 in words is "two hundred forty-nine billion, six hundred fifty-four million, four hundred thirty-one thousand, three hundred seventy-nine".