2488777561 has 4 divisors (see below), whose sum is σ = 2497572112. Its totient is φ = 2479983012.

The previous prime is 2488777547. The next prime is 2488777579. The reversal of 2488777561 is 1657778842.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2488777561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2488777591) 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, 4396851 + ... + 4397416.

It is an arithmetic number, because the mean of its divisors is an integer number (624393028).

Almost surely, 2^2488777561 is an apocalyptic number.

It is an amenable number.

2488777561 is a deficient number, since it is larger than the sum of its proper divisors (8794551).

2488777561 is an equidigital number, since it uses as much as digits as its factorization.

2488777561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8794550.

The product of its digits is 5268480, while the sum is 55.

The square root of 2488777561 is about 49887.6493833895. The cubic root of 2488777561 is about 1355.1749361791.

The spelling of 2488777561 in words is "two billion, four hundred eighty-eight million, seven hundred seventy-seven thousand, five hundred sixty-one".