2580397405 has 4 divisors (see below), whose sum is σ = 3096476892. Its totient is φ = 2064317920.

The previous prime is 2580397403. The next prime is 2580397433. The reversal of 2580397405 is 5047930852.

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 1460691961 + 1119705444 = 38219^2 + 33462^2 .

It is not a de Polignac number, because 2580397405 - 2¹ = 2580397403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2580397403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258039736 + ... + 258039745.

It is an arithmetic number, because the mean of its divisors is an integer number (774119223).

Almost surely, 2^2580397405 is an apocalyptic number.

It is an amenable number.

2580397405 is a deficient number, since it is larger than the sum of its proper divisors (516079487).

2580397405 is an equidigital number, since it uses as much as digits as its factorization.

2580397405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516079486.

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 2580397405 is about 50797.6121978189. The cubic root of 2580397405 is about 1371.6043869313.

The spelling of 2580397405 in words is "two billion, five hundred eighty million, three hundred ninety-seven thousand, four hundred five".