265153304661 has 16 divisors (see below), whose sum is σ = 404051097600. Its totient is φ = 151513186608.

The previous prime is 265153304657. The next prime is 265153304671. The reversal of 265153304661 is 166403351562.

It is not a de Polignac number, because 265153304661 - 2² = 265153304657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265153304651) 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, 1400280 + ... + 1578318.

It is an arithmetic number, because the mean of its divisors is an integer number (25253193600).

Almost surely, 2^265153304661 is an apocalyptic number.

265153304661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

265153304661 is a deficient number, since it is larger than the sum of its proper divisors (138897792939).

265153304661 is a wasteful number, since it uses less digits than its factorization.

265153304661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248968.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 265153304661 in words is "two hundred sixty-five billion, one hundred fifty-three million, three hundred four thousand, six hundred sixty-one".