16478921690 has 64 divisors (see below), whose sum is σ = 37038359808. Its totient is φ = 5128358400.

The previous prime is 16478921687. The next prime is 16478921699. The reversal of 16478921690 is 9612987461.

It is a super-2 number, since 2×16478921690² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16478921699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 492782 + ... + 525158.

It is an arithmetic number, because the mean of its divisors is an integer number (578724372).

Almost surely, 2^16478921690 is an apocalyptic number.

16478921690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16478921690 is an abundant number, since it is smaller than the sum of its proper divisors (20559438118).

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

16478921690 is a wasteful number, since it uses less digits than its factorization.

16478921690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33063.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 16478921690 in words is "sixteen billion, four hundred seventy-eight million, nine hundred twenty-one thousand, six hundred ninety".