16277855820 has 24 divisors (see below), whose sum is σ = 45577996464. Its totient is φ = 4340761536.

The previous prime is 16277855819. The next prime is 16277855879. The reversal of 16277855820 is 2855877261.

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, 135648739 + ... + 135648858.

It is an arithmetic number, because the mean of its divisors is an integer number (1899083186).

Almost surely, 2^16277855820 is an apocalyptic number.

16277855820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16277855820 is an abundant number, since it is smaller than the sum of its proper divisors (29300140644).

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

16277855820 is a wasteful number, since it uses less digits than its factorization.

16277855820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271297609 (or 271297607 counting only the distinct ones).

The product of its (nonzero) digits is 1881600, while the sum is 51.

The spelling of 16277855820 in words is "sixteen billion, two hundred seventy-seven million, eight hundred fifty-five thousand, eight hundred twenty".