265644620655 has 32 divisors (see below), whose sum is σ = 426213315840. Its totient is φ = 141283699200.

The previous prime is 265644620629. The next prime is 265644620677. The reversal of 265644620655 is 556026446562.

It is not a de Polignac number, because 265644620655 - 2⁸ = 265644620399 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 265644620598 and 265644620607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8182455 + ... + 8214855.

It is an arithmetic number, because the mean of its divisors is an integer number (13319166120).

Almost surely, 2^265644620655 is an apocalyptic number.

265644620655 is a deficient number, since it is larger than the sum of its proper divisors (160568695185).

265644620655 is a wasteful number, since it uses less digits than its factorization.

265644620655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33911.

The product of its (nonzero) digits is 10368000, while the sum is 51.

The spelling of 265644620655 in words is "two hundred sixty-five billion, six hundred forty-four million, six hundred twenty thousand, six hundred fifty-five".