16171246840 has 64 divisors (see below), whose sum is σ = 42168936960. Its totient is φ = 5466330240.

The previous prime is 16171246823. The next prime is 16171246873. The reversal of 16171246840 is 4864217161.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 16171246793 and 16171246802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386842 + ... + 426601.

It is an arithmetic number, because the mean of its divisors is an integer number (658889640).

Almost surely, 2^16171246840 is an apocalyptic number.

16171246840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16171246840 is an abundant number, since it is smaller than the sum of its proper divisors (25997690120).

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

16171246840 is a wasteful number, since it uses less digits than its factorization.

16171246840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813532 (or 813528 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 16171246840 in words is "sixteen billion, one hundred seventy-one million, two hundred forty-six thousand, eight hundred forty".