16621448254 has 16 divisors (see below), whose sum is σ = 26248896000. Its totient is φ = 7871966424.

The previous prime is 16621448237. The next prime is 16621448269. The reversal of 16621448254 is 45284412661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 16621448254.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207597 + ... + 276295.

It is an arithmetic number, because the mean of its divisors is an integer number (1640556000).

Almost surely, 2^16621448254 is an apocalyptic number.

16621448254 is a deficient number, since it is larger than the sum of its proper divisors (9627447746).

16621448254 is a wasteful number, since it uses less digits than its factorization.

16621448254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75087.

The product of its digits is 368640, while the sum is 43.

The spelling of 16621448254 in words is "sixteen billion, six hundred twenty-one million, four hundred forty-eight thousand, two hundred fifty-four".