2512561360805 has 18 divisors (see below), whose sum is σ = 3065575151574. Its totient is φ = 1976927332800.

The previous prime is 2512561360753. The next prime is 2512561360823. The reversal of 2512561360805 is 5080631652152.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 2512472266084 + 89094721 = 1585078^2 + 9439^2 .

It is not a de Polignac number, because 2512561360805 - 2¹⁶ = 2512561295269 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 216202895 + ... + 216214515.

It is an arithmetic number, because the mean of its divisors is an integer number (170309730643).

Almost surely, 2^{2512561360805} is an apocalyptic number.

It is an amenable number.

2512561360805 is a deficient number, since it is larger than the sum of its proper divisors (553013790769).

2512561360805 is an frugal number, since it uses more digits than its factorization.

2512561360805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23369 (or 11687 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 2512561360805 in words is "two trillion, five hundred twelve billion, five hundred sixty-one million, three hundred sixty thousand, eight hundred five".