16366371840 has 704 divisors, whose sum is σ = 71640414720. Its totient is φ = 3450470400.

The previous prime is 16366371823. The next prime is 16366371863. The reversal of 16366371840 is 4817366361.

16366371840 is a `hidden beast` number, since 1 + 6 + 3 + 6 + 637 + 1 + 8 + 4 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12579190 + ... + 12580490.

Almost surely, 2^16366371840 is an apocalyptic number.

16366371840 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 16366371840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35820207360).

16366371840 is an abundant number, since it is smaller than the sum of its proper divisors (55274042880).

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

16366371840 is a wasteful number, since it uses less digits than its factorization.

16366371840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355 (or 1331 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 16366371840 in words is "sixteen billion, three hundred sixty-six million, three hundred seventy-one thousand, eight hundred forty".