16771817412 has 54 divisors (see below), whose sum is σ = 49317134958. Its totient is φ = 4791947328.

The previous prime is 16771817401. The next prime is 16771817429. The reversal of 16771817412 is 21471817761.

16771817412 is a `hidden beast` number, since 167 + 71 + 8 + 1 + 7 + 412 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14197675716 + 2574141696 = 119154^2 + 50736^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4752153 + ... + 4755680.

It is an arithmetic number, because the mean of its divisors is an integer number (913280277).

Almost surely, 2^16771817412 is an apocalyptic number.

16771817412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16771817412 is an abundant number, since it is smaller than the sum of its proper divisors (32545317546).

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

16771817412 is a wasteful number, since it uses less digits than its factorization.

16771817412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9507857 (or 9507845 counting only the distinct ones).

The product of its digits is 131712, while the sum is 45.

The spelling of 16771817412 in words is "sixteen billion, seven hundred seventy-one million, eight hundred seventeen thousand, four hundred twelve".