249510013842 has 32 divisors (see below), whose sum is σ = 499637292480. Its totient is φ = 83067183360.

The previous prime is 249510013817. The next prime is 249510013847. The reversal of 249510013842 is 248310015942.

It is a self number, because there is not a number n which added to its sum of digits gives 249510013842.

It is not an unprimeable number, because it can be changed into a prime (249510013847) 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, 28737742 + ... + 28746422.

It is an arithmetic number, because the mean of its divisors is an integer number (15613665390).

Almost surely, 2^249510013842 is an apocalyptic number.

249510013842 is an abundant number, since it is smaller than the sum of its proper divisors (250127278638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

249510013842 is a wasteful number, since it uses less digits than its factorization.

249510013842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14058.

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 249510013842 in words is "two hundred forty-nine billion, five hundred ten million, thirteen thousand, eight hundred forty-two".