2540377818805 has 8 divisors (see below), whose sum is σ = 3122805904344. Its totient is φ = 1982733907200.

The previous prime is 2540377818761. The next prime is 2540377818833. The reversal of 2540377818805 is 5088187730452.

It can be written as a sum of positive squares in 4 ways, for example, as 180829908081 + 2359547910724 = 425241^2 + 1536082^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2540377818805 - 2¹⁷ = 2540377687733 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 2540377818805.

It is a congruent number.

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, 6196043256 + ... + 6196043665.

It is an arithmetic number, because the mean of its divisors is an integer number (390350738043).

Almost surely, 2^{2540377818805} is an apocalyptic number.

It is an amenable number.

2540377818805 is a deficient number, since it is larger than the sum of its proper divisors (582428085539).

2540377818805 is a wasteful number, since it uses less digits than its factorization.

2540377818805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12392086967.

The product of its (nonzero) digits is 15052800, while the sum is 58.

The spelling of 2540377818805 in words is "two trillion, five hundred forty billion, three hundred seventy-seven million, eight hundred eighteen thousand, eight hundred five".