404236494981 has 48 divisors (see below), whose sum is σ = 674208924480. Its totient is φ = 230815008000.

The previous prime is 404236494911. The next prime is 404236494989. The reversal of 404236494981 is 189494632404.

404236494981 is a `hidden beast` number, since 4 + 0 + 42 + 36 + 494 + 9 + 81 = 666.

It is not a de Polignac number, because 404236494981 - 2¹⁵ = 404236462213 is a prime.

It is a super-2 number, since 2×404236494981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404236494989) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 253200 + ... + 934121.

It is an arithmetic number, because the mean of its divisors is an integer number (14046019260).

Almost surely, 2^404236494981 is an apocalyptic number.

It is an amenable number.

404236494981 is a deficient number, since it is larger than the sum of its proper divisors (269972429499).

404236494981 is a wasteful number, since it uses less digits than its factorization.

404236494981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187538 (or 1187535 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The spelling of 404236494981 in words is "four hundred four billion, two hundred thirty-six million, four hundred ninety-four thousand, nine hundred eighty-one".