2585407391 has 32 divisors (see below), whose sum is σ = 3210762240. Its totient is φ = 2033006976.

The previous prime is 2585407381. The next prime is 2585407459. The reversal of 2585407391 is 1937045852.

It is not a de Polignac number, because 2585407391 - 2¹⁴ = 2585391007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2585407361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 731270 + ... + 734796.

It is an arithmetic number, because the mean of its divisors is an integer number (100336320).

Almost surely, 2^2585407391 is an apocalyptic number.

2585407391 is a deficient number, since it is larger than the sum of its proper divisors (625354849).

2585407391 is a wasteful number, since it uses less digits than its factorization.

2585407391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 2585407391 is about 50846.9014886846. The cubic root of 2585407391 is about 1372.4914952863.

The spelling of 2585407391 in words is "two billion, five hundred eighty-five million, four hundred seven thousand, three hundred ninety-one".