16626776478 has 16 divisors (see below), whose sum is σ = 35811518736. Its totient is φ = 5115931200.

The previous prime is 16626776473. The next prime is 16626776479. The reversal of 16626776478 is 87467762661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16626776473) 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, 106581823 + ... + 106581978.

It is an arithmetic number, because the mean of its divisors is an integer number (2238219921).

Almost surely, 2^16626776478 is an apocalyptic number.

16626776478 is an abundant number, since it is smaller than the sum of its proper divisors (19184742258).

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

16626776478 is a wasteful number, since it uses less digits than its factorization.

16626776478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213163819.

The product of its digits is 28449792, while the sum is 60.

The spelling of 16626776478 in words is "sixteen billion, six hundred twenty-six million, seven hundred seventy-six thousand, four hundred seventy-eight".