2544135561 has 80 divisors (see below), whose sum is σ = 4436011008. Its totient is φ = 1435968000.

The previous prime is 2544135553. The next prime is 2544135569. The reversal of 2544135561 is 1655314452.

2544135561 is a `hidden beast` number, since 2 + 54 + 41 + 3 + 5 + 561 = 666.

2544135561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2544135553) and next prime (2544135569).

It is not a de Polignac number, because 2544135561 - 2³ = 2544135553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2544135569) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1529016 + ... + 1530678.

Almost surely, 2^2544135561 is an apocalyptic number.

It is an amenable number.

2544135561 is a deficient number, since it is larger than the sum of its proper divisors (1891875447).

2544135561 is a wasteful number, since it uses less digits than its factorization.

2544135561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804 (or 1795 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 2544135561 is about 50439.4246695975. The cubic root of 2544135561 is about 1365.1490864814.

The spelling of 2544135561 in words is "two billion, five hundred forty-four million, one hundred thirty-five thousand, five hundred sixty-one".