249991911045 has 96 divisors (see below), whose sum is σ = 450933350400. Its totient is φ = 127983139200.

The previous prime is 249991910957. The next prime is 249991911067. The reversal of 249991911045 is 540119199942.

It is not a de Polignac number, because 249991911045 - 2³⁵ = 215632172677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249991910982 and 249991911000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 122604136 + ... + 122606174.

It is an arithmetic number, because the mean of its divisors is an integer number (4697222400).

Almost surely, 2^249991911045 is an apocalyptic number.

It is an amenable number.

249991911045 is a deficient number, since it is larger than the sum of its proper divisors (200941439355).

249991911045 is a wasteful number, since it uses less digits than its factorization.

249991911045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751 (or 2748 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The spelling of 249991911045 in words is "two hundred forty-nine billion, nine hundred ninety-one million, nine hundred eleven thousand, forty-five".