265779961485 has 16 divisors (see below), whose sum is σ = 435619840320. Its totient is φ = 138292012160.

The previous prime is 265779961483. The next prime is 265779961487. The reversal of 265779961485 is 584169977562.

It is an interprime number because it is at equal distance from previous prime (265779961483) and next prime (265779961487).

It is not a de Polignac number, because 265779961485 - 2¹ = 265779961483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265779961481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216080655 + ... + 216081884.

It is an arithmetic number, because the mean of its divisors is an integer number (27226240020).

Almost surely, 2^265779961485 is an apocalyptic number.

It is an amenable number.

265779961485 is a deficient number, since it is larger than the sum of its proper divisors (169839878835).

265779961485 is a wasteful number, since it uses less digits than its factorization.

265779961485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432162588.

The product of its digits is 228614400, while the sum is 69.

The spelling of 265779961485 in words is "two hundred sixty-five billion, seven hundred seventy-nine million, nine hundred sixty-one thousand, four hundred eighty-five".