16623662401 has 8 divisors (see below), whose sum is σ = 17083255680. Its totient is φ = 16164611568.

The previous prime is 16623662399. The next prime is 16623662467. The reversal of 16623662401 is 10426632661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16623662401 - 2¹ = 16623662399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16623662491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73081 + ... + 196438.

It is an arithmetic number, because the mean of its divisors is an integer number (2135406960).

Almost surely, 2^16623662401 is an apocalyptic number.

It is an amenable number.

16623662401 is a deficient number, since it is larger than the sum of its proper divisors (459593279).

16623662401 is a wasteful number, since it uses less digits than its factorization.

16623662401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271223.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 16623662401 in words is "sixteen billion, six hundred twenty-three million, six hundred sixty-two thousand, four hundred one".