249238172380 has 12 divisors (see below), whose sum is σ = 523400162040. Its totient is φ = 99695268944.

The previous prime is 249238172357. The next prime is 249238172383. The reversal of 249238172380 is 83271832942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249238172383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6230954290 + ... + 6230954329.

It is an arithmetic number, because the mean of its divisors is an integer number (43616680170).

Almost surely, 2^249238172380 is an apocalyptic number.

249238172380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249238172380 is an abundant number, since it is smaller than the sum of its proper divisors (274161989660).

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

249238172380 is a wasteful number, since it uses less digits than its factorization.

249238172380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12461908628 (or 12461908626 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 249238172380 in words is "two hundred forty-nine billion, two hundred thirty-eight million, one hundred seventy-two thousand, three hundred eighty".