249154789440 has 56 divisors (see below), whose sum is σ = 791066459520. Its totient is φ = 66441276928.

The previous prime is 249154789379. The next prime is 249154789441. The reversal of 249154789440 is 44987451942.

It is not an unprimeable number, because it can be changed into a prime (249154789441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129767160 + ... + 129769079.

Almost surely, 2^249154789440 is an apocalyptic number.

249154789440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249154789440 is an abundant number, since it is smaller than the sum of its proper divisors (541911670080).

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

249154789440 is a wasteful number, since it uses less digits than its factorization.

249154789440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259536259 (or 259536249 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 249154789440 in words is "two hundred forty-nine billion, one hundred fifty-four million, seven hundred eighty-nine thousand, four hundred forty".