16231868640 has 360 divisors, whose sum is σ = 62038840248. Its totient is φ = 3994997760.

The previous prime is 16231868633. The next prime is 16231868659. The reversal of 16231868640 is 4686813261.

16231868640 is a `hidden beast` number, since 1 + 623 + 18 + 6 + 8 + 6 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 59 ways as a sum of consecutive naturals, for example, 2186535 + ... + 2193945.

Almost surely, 2^16231868640 is an apocalyptic number.

16231868640 is a gapful number since it is divisible by the number (10) 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 16231868640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31019420124).

16231868640 is an abundant number, since it is smaller than the sum of its proper divisors (45806971608).

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

16231868640 is a wasteful number, since it uses less digits than its factorization.

16231868640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7464 (or 7434 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 16231868640 in words is "sixteen billion, two hundred thirty-one million, eight hundred sixty-eight thousand, six hundred forty".