2528377304465 has 4 divisors (see below), whose sum is σ = 3034052765364. Its totient is φ = 2022701843568.

The previous prime is 2528377304447. The next prime is 2528377304501. The reversal of 2528377304465 is 5644037738252.

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 2013949824769 + 514427479696 = 1419137^2 + 717236^2 .

It is a cyclic number.

It is not a de Polignac number, because 2528377304465 - 2⁸ = 2528377304209 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 2528377304465.

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, 252837730442 + ... + 252837730451.

It is an arithmetic number, because the mean of its divisors is an integer number (758513191341).

Almost surely, 2^{2528377304465} is an apocalyptic number.

It is an amenable number.

2528377304465 is a deficient number, since it is larger than the sum of its proper divisors (505675460899).

2528377304465 is an equidigital number, since it uses as much as digits as its factorization.

2528377304465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505675460898.

The product of its (nonzero) digits is 33868800, while the sum is 56.

The spelling of 2528377304465 in words is "two trillion, five hundred twenty-eight billion, three hundred seventy-seven million, three hundred four thousand, four hundred sixty-five".