11958028138 has 32 divisors (see below), whose sum is σ = 21596768640. Its totient is φ = 4851005760.

The previous prime is 11958028129. The next prime is 11958028213. The reversal of 11958028138 is 83182085911.

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, 304128 + ... + 341188.

It is an arithmetic number, because the mean of its divisors is an integer number (674899020).

Almost surely, 2^11958028138 is an apocalyptic number.

11958028138 is a deficient number, since it is larger than the sum of its proper divisors (9638740502).

11958028138 is a wasteful number, since it uses less digits than its factorization.

11958028138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38302.

The product of its (nonzero) digits is 138240, while the sum is 46.

The spelling of 11958028138 in words is "eleven billion, nine hundred fifty-eight million, twenty-eight thousand, one hundred thirty-eight".