249785230636 has 48 divisors (see below), whose sum is σ = 450130912000. Its totient is φ = 121214947392.

The previous prime is 249785230633. The next prime is 249785230699. The reversal of 249785230636 is 636032587942.

It is a super-2 number, since 2×249785230636² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (249785230633) 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, 28370611 + ... + 28379413.

Almost surely, 2^249785230636 is an apocalyptic number.

It is an amenable number.

249785230636 is a deficient number, since it is larger than the sum of its proper divisors (200345681364).

249785230636 is a wasteful number, since it uses less digits than its factorization.

249785230636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9878 (or 9876 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 55.

The spelling of 249785230636 in words is "two hundred forty-nine billion, seven hundred eighty-five million, two hundred thirty thousand, six hundred thirty-six".