249125727818 has 16 divisors (see below), whose sum is σ = 409365982080. Its totient is φ = 112765161600.

The previous prime is 249125727787. The next prime is 249125727841. The reversal of 249125727818 is 818727521942.

It is a happy number.

It is a super-2 number, since 2×249125727818² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23684903 + ... + 23695418.

It is an arithmetic number, because the mean of its divisors is an integer number (25585373880).

Almost surely, 2^249125727818 is an apocalyptic number.

249125727818 is a deficient number, since it is larger than the sum of its proper divisors (160240254262).

249125727818 is a wasteful number, since it uses less digits than its factorization.

249125727818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47380573.

The product of its digits is 4515840, while the sum is 56.

The spelling of 249125727818 in words is "two hundred forty-nine billion, one hundred twenty-five million, seven hundred twenty-seven thousand, eight hundred eighteen".