1656223077404 has 96 divisors (see below), whose sum is σ = 3442331934720. Its totient is φ = 682301030400.

The previous prime is 1656223077389. The next prime is 1656223077413. The reversal of 1656223077404 is 4047703226561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80073944 + ... + 80094624.

It is an arithmetic number, because the mean of its divisors is an integer number (35857624320).

Almost surely, 2^{1656223077404} is an apocalyptic number.

1656223077404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1656223077404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1721165967360).

1656223077404 is an abundant number, since it is smaller than the sum of its proper divisors (1786108857316).

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

1656223077404 is a wasteful number, since it uses less digits than its factorization.

1656223077404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21339 (or 21337 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 47.

The spelling of 1656223077404 in words is "one trillion, six hundred fifty-six billion, two hundred twenty-three million, seventy-seven thousand, four hundred four".