16778651936 has 48 divisors (see below), whose sum is σ = 34822740960. Its totient is φ = 7936081920.

The previous prime is 16778651927. The next prime is 16778651941. The reversal of 16778651936 is 63915687761.

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

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, 400160 + ... + 440096.

It is an arithmetic number, because the mean of its divisors is an integer number (725473770).

Almost surely, 2^16778651936 is an apocalyptic number.

16778651936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16778651936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17411370480).

16778651936 is an abundant number, since it is smaller than the sum of its proper divisors (18044089024).

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

16778651936 is a wasteful number, since it uses less digits than its factorization.

16778651936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40657 (or 40649 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 59.

The spelling of 16778651936 in words is "sixteen billion, seven hundred seventy-eight million, six hundred fifty-one thousand, nine hundred thirty-six".