11421777403818 has 40 divisors (see below), whose sum is σ = 25593833456928. Its totient is φ = 3807171143496.

The previous prime is 11421777403787. The next prime is 11421777403853. The reversal of 11421777403818 is 81830477712411.

11421777403818 is a `hidden beast` number, since 1 + 1 + 4 + 217 + 7 + 7 + 40 + 381 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6413755 + ... + 7998737.

Almost surely, 2^{11421777403818} is an apocalyptic number.

11421777403818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11421777403818 is an abundant number, since it is smaller than the sum of its proper divisors (14172056053110).

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

11421777403818 is a wasteful number, since it uses less digits than its factorization.

11421777403818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629480 (or 1629471 counting only the distinct ones).

The product of its (nonzero) digits is 2107392, while the sum is 54.

The spelling of 11421777403818 in words is "eleven trillion, four hundred twenty-one billion, seven hundred seventy-seven million, four hundred three thousand, eight hundred eighteen".