165802800440 has 64 divisors (see below), whose sum is σ = 381813838560. Its totient is φ = 64764887040.

The previous prime is 165802800433. The next prime is 165802800451. The reversal of 165802800440 is 44008208561.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 165802800394 and 165802800403.

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, 12241352 + ... + 12254888.

Almost surely, 2^165802800440 is an apocalyptic number.

165802800440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165802800440 is an abundant number, since it is smaller than the sum of its proper divisors (216011038120).

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

165802800440 is a wasteful number, since it uses less digits than its factorization.

165802800440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20712 (or 20708 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The spelling of 165802800440 in words is "one hundred sixty-five billion, eight hundred two million, eight hundred thousand, four hundred forty".