11918648340 has 96 divisors (see below), whose sum is σ = 37984705920. Its totient is φ = 3100780800.

The previous prime is 11918648257. The next prime is 11918648353. The reversal of 11918648340 is 4384681911.

11918648340 is a `hidden beast` number, since 1 + 1 + 91 + 86 + 483 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 247026 + ... + 291305.

It is an arithmetic number, because the mean of its divisors is an integer number (395674020).

Almost surely, 2^11918648340 is an apocalyptic number.

11918648340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11918648340 is an abundant number, since it is smaller than the sum of its proper divisors (26066057580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11918648340 is a wasteful number, since it uses less digits than its factorization.

11918648340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538390 (or 538382 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 11918648340 in words is "eleven billion, nine hundred eighteen million, six hundred forty-eight thousand, three hundred forty".