265520213461 has 4 divisors (see below), whose sum is σ = 277064570592. Its totient is φ = 253975856332.

The previous prime is 265520213437. The next prime is 265520213473. The reversal of 265520213461 is 164312025562.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 164312025562 = 2 ⋅82156012781.

It is a cyclic number.

It is not a de Polignac number, because 265520213461 - 2⁵ = 265520213429 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 265520213461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265520273461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5772178531 + ... + 5772178576.

It is an arithmetic number, because the mean of its divisors is an integer number (69266142648).

Almost surely, 2^265520213461 is an apocalyptic number.

It is an amenable number.

265520213461 is a deficient number, since it is larger than the sum of its proper divisors (11544357131).

265520213461 is a wasteful number, since it uses less digits than its factorization.

265520213461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11544357130.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 265520213461 in words is "two hundred sixty-five billion, five hundred twenty million, two hundred thirteen thousand, four hundred sixty-one".