249007738856 has 32 divisors (see below), whose sum is σ = 479870250240. Its totient is φ = 121047421248.

The previous prime is 249007738853. The next prime is 249007738877. The reversal of 249007738856 is 658837700942.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 249007738795 and 249007738804.

It is not an unprimeable number, because it can be changed into a prime (249007738853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75821 + ... + 709763.

It is an arithmetic number, because the mean of its divisors is an integer number (14995945320).

Almost surely, 2^249007738856 is an apocalyptic number.

It is an amenable number.

249007738856 is a deficient number, since it is larger than the sum of its proper divisors (230862511384).

249007738856 is a wasteful number, since it uses less digits than its factorization.

249007738856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635313 (or 635309 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 59.

The spelling of 249007738856 in words is "two hundred forty-nine billion, seven million, seven hundred thirty-eight thousand, eight hundred fifty-six".