2549423641 has 4 divisors (see below), whose sum is σ = 2549864484. Its totient is φ = 2548982800.

The previous prime is 2549423587. The next prime is 2549423647. The reversal of 2549423641 is 1463249452.

It is a happy number.

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 799758400 + 1749665241 = 28280^2 + 41829^2 .

It is a cyclic number.

It is not a de Polignac number, because 2549423641 - 2²⁷ = 2415205913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2549423594 and 2549423603.

It is not an unprimeable number, because it can be changed into a prime (2549423647) 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, 211630 + ... + 223351.

It is an arithmetic number, because the mean of its divisors is an integer number (637466121).

Almost surely, 2^2549423641 is an apocalyptic number.

It is an amenable number.

2549423641 is a deficient number, since it is larger than the sum of its proper divisors (440843).

2549423641 is an equidigital number, since it uses as much as digits as its factorization.

2549423641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440842.

The product of its digits is 207360, while the sum is 40.

The square root of 2549423641 is about 50491.8175648293. The cubic root of 2549423641 is about 1366.0942695650.

The spelling of 2549423641 in words is "two billion, five hundred forty-nine million, four hundred twenty-three thousand, six hundred forty-one".