165623260506 has 64 divisors (see below), whose sum is σ = 383923946880. Its totient is φ = 47148514560.

The previous prime is 165623260463. The next prime is 165623260507. The reversal of 165623260506 is 605062326561.

It is not an unprimeable number, because it can be changed into a prime (165623260507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1098541 + ... + 1240176.

It is an arithmetic number, because the mean of its divisors is an integer number (5998811670).

Almost surely, 2^165623260506 is an apocalyptic number.

165623260506 is an abundant number, since it is smaller than the sum of its proper divisors (218300686374).

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

165623260506 is a wasteful number, since it uses less digits than its factorization.

165623260506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338799.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 165623260506 in words is "one hundred sixty-five billion, six hundred twenty-three million, two hundred sixty thousand, five hundred six".