2585477861 has 16 divisors (see below), whose sum is σ = 2843942400. Its totient is φ = 2339543808.

The previous prime is 2585477819. The next prime is 2585477879. The reversal of 2585477861 is 1687745852.

It is not a de Polignac number, because 2585477861 - 2¹⁴ = 2585461477 is a prime.

It is a super-2 number, since 2×2585477861² = 13369391539442270642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2585477761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106856 + ... + 128798.

It is an arithmetic number, because the mean of its divisors is an integer number (177746400).

Almost surely, 2^2585477861 is an apocalyptic number.

It is an amenable number.

2585477861 is a deficient number, since it is larger than the sum of its proper divisors (258464539).

2585477861 is a wasteful number, since it uses less digits than its factorization.

2585477861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22228.

The product of its digits is 3763200, while the sum is 53.

The square root of 2585477861 is about 50847.5944465419. The cubic root of 2585477861 is about 1372.5039650937.

The spelling of 2585477861 in words is "two billion, five hundred eighty-five million, four hundred seventy-seven thousand, eight hundred sixty-one".