165426426400 has 72 divisors (see below), whose sum is σ = 412439852160. Its totient is φ = 64762671360.

The previous prime is 165426426391. The next prime is 165426426409. The reversal of 165426426400 is 4624624561.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (165426426391) and next prime (165426426409).

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

It is not an unprimeable number, because it can be changed into a prime (165426426409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2162220 + ... + 2237419.

It is an arithmetic number, because the mean of its divisors is an integer number (5728331280).

Almost surely, 2^165426426400 is an apocalyptic number.

165426426400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165426426400 is an abundant number, since it is smaller than the sum of its proper divisors (247013425760).

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

165426426400 is a wasteful number, since it uses less digits than its factorization.

165426426400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4399706 (or 4399693 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 165426426400 in words is "one hundred sixty-five billion, four hundred twenty-six million, four hundred twenty-six thousand, four hundred".