404260051644 has 18 divisors (see below), whose sum is σ = 1021879575080. Its totient is φ = 134753350536.

The previous prime is 404260051639. The next prime is 404260051687. The reversal of 404260051644 is 446150062404.

404260051644 is a `hidden beast` number, since 4 + 0 + 4 + 2 + 6 + 0 + 0 + 5 + 1 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 11229445879 = 404260051644 / (4 + 0 + 4 + 2 + 6 + 0 + 0 + 5 + 1 + 6 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 404260051599 and 404260051608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5614722904 + ... + 5614722975.

Almost surely, 2^404260051644 is an apocalyptic number.

It is an amenable number.

404260051644 is an abundant number, since it is smaller than the sum of its proper divisors (617619523436).

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

404260051644 is a wasteful number, since it uses less digits than its factorization.

404260051644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11229445889 (or 11229445884 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The spelling of 404260051644 in words is "four hundred four billion, two hundred sixty million, fifty-one thousand, six hundred forty-four".