268454378557465 has 4 divisors (see below), whose sum is σ = 322145254268964. Its totient is φ = 214763502845968.

The previous prime is 268454378557459. The next prime is 268454378557499. The reversal of 268454378557465 is 564755873454862.

268454378557465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108887889324096 + 159566489233369 = 10434936^2 + 12631963^2 .

It is a cyclic number.

It is not a de Polignac number, because 268454378557465 - 2²⁹ = 268453841686553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26845437855742 + ... + 26845437855751.

It is an arithmetic number, because the mean of its divisors is an integer number (80536313567241).

Almost surely, 2^{268454378557465} is an apocalyptic number.

It is an amenable number.

268454378557465 is a deficient number, since it is larger than the sum of its proper divisors (53690875711499).

268454378557465 is an equidigital number, since it uses as much as digits as its factorization.

268454378557465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53690875711498.

The product of its digits is 27095040000, while the sum is 79.

The spelling of 268454378557465 in words is "two hundred sixty-eight trillion, four hundred fifty-four billion, three hundred seventy-eight million, five hundred fifty-seven thousand, four hundred sixty-five".