165265335510 has 64 divisors (see below), whose sum is σ = 451507530240. Its totient is φ = 38322394880.

The previous prime is 165265335379. The next prime is 165265335523. The reversal of 165265335510 is 15533562561.

It is a super-2 number, since 2×165265335510² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10879455 + ... + 10894634.

It is an arithmetic number, because the mean of its divisors is an integer number (7054805160).

Almost surely, 2^165265335510 is an apocalyptic number.

165265335510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165265335510 is an abundant number, since it is smaller than the sum of its proper divisors (286242194730).

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

165265335510 is a wasteful number, since it uses less digits than its factorization.

165265335510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21774133.

The product of its (nonzero) digits is 405000, while the sum is 42.

The spelling of 165265335510 in words is "one hundred sixty-five billion, two hundred sixty-five million, three hundred thirty-five thousand, five hundred ten".