265151527781 has 12 divisors (see below), whose sum is σ = 326585196108. Its totient is φ = 213903752832.

The previous prime is 265151527723. The next prime is 265151527789. The reversal of 265151527781 is 187725151562.

It can be written as a sum of positive squares in 2 ways, for example, as 91708431556 + 173443096225 = 302834^2 + 416465^2 .

It is not a de Polignac number, because 265151527781 - 2⁶ = 265151527717 is a prime.

It is a super-2 number, since 2×265151527781² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265151527789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159153746 + ... + 159155411.

It is an arithmetic number, because the mean of its divisors is an integer number (27215433009).

Almost surely, 2^265151527781 is an apocalyptic number.

It is an amenable number.

265151527781 is a deficient number, since it is larger than the sum of its proper divisors (61433668327).

265151527781 is a wasteful number, since it uses less digits than its factorization.

265151527781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318309188 (or 318309181 counting only the distinct ones).

The product of its digits is 1176000, while the sum is 50.

The spelling of 265151527781 in words is "two hundred sixty-five billion, one hundred fifty-one million, five hundred twenty-seven thousand, seven hundred eighty-one".