265126195551 has 32 divisors (see below), whose sum is σ = 419592798208. Its totient is φ = 145714036320.

The previous prime is 265126195549. The next prime is 265126195577. The reversal of 265126195551 is 155591621562.

It is not a de Polignac number, because 265126195551 - 2¹ = 265126195549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 265126195551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265126195541) 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, 1143151 + ... + 1355376.

It is an arithmetic number, because the mean of its divisors is an integer number (13112274944).

Almost surely, 2^265126195551 is an apocalyptic number.

265126195551 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

265126195551 is a deficient number, since it is larger than the sum of its proper divisors (154466602657).

265126195551 is a wasteful number, since it uses less digits than its factorization.

265126195551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2498731.

The product of its digits is 810000, while the sum is 48.

The spelling of 265126195551 in words is "two hundred sixty-five billion, one hundred twenty-six million, one hundred ninety-five thousand, five hundred fifty-one".