1623664011644 has 12 divisors (see below), whose sum is σ = 2841536221944. Its totient is φ = 811796519664.

The previous prime is 1623664011623. The next prime is 1623664011653. The reversal of 1623664011644 is 4461104663261.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1623664011595 and 1623664011604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8768459 + ... + 8951714.

It is an arithmetic number, because the mean of its divisors is an integer number (236794685162).

Almost surely, 2^{1623664011644} is an apocalyptic number.

It is an amenable number.

1623664011644 is a deficient number, since it is larger than the sum of its proper divisors (1217872210300).

1623664011644 is a wasteful number, since it uses less digits than its factorization.

1623664011644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17743084 (or 17743082 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 1623664011644 in words is "one trillion, six hundred twenty-three billion, six hundred sixty-four million, eleven thousand, six hundred forty-four".