11995990258 has 32 divisors (see below), whose sum is σ = 20912911488. Its totient is φ = 5054140800.

The previous prime is 11995990247. The next prime is 11995990283. The reversal of 11995990258 is 85209959911.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2842566 + ... + 2846782.

It is an arithmetic number, because the mean of its divisors is an integer number (653528484).

Almost surely, 2^11995990258 is an apocalyptic number.

11995990258 is a deficient number, since it is larger than the sum of its proper divisors (8916921230).

11995990258 is a wasteful number, since it uses less digits than its factorization.

11995990258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7618.

The product of its (nonzero) digits is 2624400, while the sum is 58.

The spelling of 11995990258 in words is "eleven billion, nine hundred ninety-five million, nine hundred ninety thousand, two hundred fifty-eight".