404543665842 has 32 divisors (see below), whose sum is σ = 856830960000. Its totient is φ = 126893399808.

The previous prime is 404543665837. The next prime is 404543665873. The reversal of 404543665842 is 248566345404.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

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, 241459 + ... + 931337.

It is an arithmetic number, because the mean of its divisors is an integer number (26775967500).

Almost surely, 2^404543665842 is an apocalyptic number.

404543665842 is an abundant number, since it is smaller than the sum of its proper divisors (452287294158).

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

404543665842 is a wasteful number, since it uses less digits than its factorization.

404543665842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695650.

The product of its (nonzero) digits is 11059200, while the sum is 51.

It can be divided in two parts, 4045436 and 65842, that added together give a triangular number (4111278 = T₂₈₆₇).

The spelling of 404543665842 in words is "four hundred four billion, five hundred forty-three million, six hundred sixty-five thousand, eight hundred forty-two".