11640251858 has 8 divisors (see below), whose sum is σ = 17467119228. Its totient is φ = 5817878784.

The previous prime is 11640251803. The next prime is 11640251873. The reversal of 11640251858 is 85815204611.

It can be written as a sum of positive squares in 2 ways, for example, as 11053788769 + 586463089 = 105137^2 + 24217^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1117091 + ... + 1127462.

Almost surely, 2^11640251858 is an apocalyptic number.

11640251858 is a deficient number, since it is larger than the sum of its proper divisors (5826867370).

11640251858 is a wasteful number, since it uses less digits than its factorization.

11640251858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2247148.

The product of its (nonzero) digits is 76800, while the sum is 41.

The spelling of 11640251858 in words is "eleven billion, six hundred forty million, two hundred fifty-one thousand, eight hundred fifty-eight".