165026606440 has 32 divisors (see below), whose sum is σ = 371702040480. Its totient is φ = 65940922432.

The previous prime is 165026606413. The next prime is 165026606443. The reversal of 165026606440 is 44606620561.

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 = 165026606393 and 165026606402.

It is not an unprimeable number, because it can be changed into a prime (165026606443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2140402 + ... + 2216161.

It is an arithmetic number, because the mean of its divisors is an integer number (11615688765).

Almost surely, 2^165026606440 is an apocalyptic number.

165026606440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165026606440 is an abundant number, since it is smaller than the sum of its proper divisors (206675434040).

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

165026606440 is a wasteful number, since it uses less digits than its factorization.

165026606440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4357521 (or 4357517 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 165026606440 in words is "one hundred sixty-five billion, twenty-six million, six hundred six thousand, four hundred forty".