11854497990 has 32 divisors (see below), whose sum is σ = 28569853440. Its totient is φ = 3147970784.

The previous prime is 11854497983. The next prime is 11854498001. The reversal of 11854497990 is 9979445811.

It is a self number, because there is not a number n which added to its sum of digits gives 11854497990.

It is a congruent number.

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, 819504 + ... + 833843.

It is an arithmetic number, because the mean of its divisors is an integer number (892807920).

Almost surely, 2^11854497990 is an apocalyptic number.

11854497990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11854497990 is an abundant number, since it is smaller than the sum of its proper divisors (16715355450).

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

11854497990 is a wasteful number, since it uses less digits than its factorization.

11854497990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653596.

The product of its (nonzero) digits is 3265920, while the sum is 57.

The spelling of 11854497990 in words is "eleven billion, eight hundred fifty-four million, four hundred ninety-seven thousand, nine hundred ninety".