265640506356434 has 16 divisors (see below), whose sum is σ = 434703331470816. Its totient is φ = 120740444006400.

The previous prime is 265640506356419. The next prime is 265640506356457. The reversal of 265640506356434 is 434653605046562.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261516632 + ... + 262530435.

It is an arithmetic number, because the mean of its divisors is an integer number (27168958216926).

Almost surely, 2^{265640506356434} is an apocalyptic number.

265640506356434 is a deficient number, since it is larger than the sum of its proper divisors (169062825114382).

265640506356434 is a wasteful number, since it uses less digits than its factorization.

265640506356434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524070121.

The product of its (nonzero) digits is 186624000, while the sum is 59.

The spelling of 265640506356434 in words is "two hundred sixty-five trillion, six hundred forty billion, five hundred six million, three hundred fifty-six thousand, four hundred thirty-four".