265161172026 has 16 divisors (see below), whose sum is σ = 530589263904. Its totient is φ = 88342570704.

The previous prime is 265161171991. The next prime is 265161172037. The reversal of 265161172026 is 620271161562.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11108745 + ... + 11132588.

It is an arithmetic number, because the mean of its divisors is an integer number (33161828994).

Almost surely, 2^265161172026 is an apocalyptic number.

265161172026 is an abundant number, since it is smaller than the sum of its proper divisors (265428091878).

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

265161172026 is a wasteful number, since it uses less digits than its factorization.

265161172026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22243325.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 265161172026 in words is "two hundred sixty-five billion, one hundred sixty-one million, one hundred seventy-two thousand, twenty-six".