1404402643556 has 48 divisors (see below), whose sum is σ = 2790193875840. Its totient is φ = 612661432320.

The previous prime is 1404402643549. The next prime is 1404402643603. The reversal of 1404402643556 is 6553462044041.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3082205 + ... + 3508388.

It is an arithmetic number, because the mean of its divisors is an integer number (58129039080).

Almost surely, 2^{1404402643556} is an apocalyptic number.

It is an amenable number.

1404402643556 is a deficient number, since it is larger than the sum of its proper divisors (1385791232284).

1404402643556 is a wasteful number, since it uses less digits than its factorization.

1404402643556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6590804 (or 6590802 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 44.

Adding to 1404402643556 its reverse (6553462044041), we get a palindrome (7957864687597).

The spelling of 1404402643556 in words is "one trillion, four hundred four billion, four hundred two million, six hundred forty-three thousand, five hundred fifty-six".