2541438078465 has 64 divisors (see below), whose sum is σ = 4777515654912. Its totient is φ = 1137349939200.

The previous prime is 2541438078427. The next prime is 2541438078493. The reversal of 2541438078465 is 5648708341452.

It is not a de Polignac number, because 2541438078465 - 2¹³ = 2541438070273 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41962405 + ... + 42022925.

It is an arithmetic number, because the mean of its divisors is an integer number (74648682108).

Almost surely, 2^{2541438078465} is an apocalyptic number.

It is an amenable number.

2541438078465 is a deficient number, since it is larger than the sum of its proper divisors (2236077576447).

2541438078465 is a wasteful number, since it uses less digits than its factorization.

2541438078465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80130.

The product of its (nonzero) digits is 25804800, while the sum is 57.

The spelling of 2541438078465 in words is "two trillion, five hundred forty-one billion, four hundred thirty-eight million, seventy-eight thousand, four hundred sixty-five".