2545540442 has 8 divisors (see below), whose sum is σ = 3861213300. Its totient is φ = 1258469344.

The previous prime is 2545540423. The next prime is 2545540451. The reversal of 2545540442 is 2440455452.

It can be written as a sum of positive squares in 2 ways, for example, as 2405804401 + 139736041 = 49049^2 + 11821^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2545540442² = 12959552283715110728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7150217 + ... + 7150572.

Almost surely, 2^2545540442 is an apocalyptic number.

2545540442 is a deficient number, since it is larger than the sum of its proper divisors (1315672858).

2545540442 is a wasteful number, since it uses less digits than its factorization.

2545540442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14300880.

The product of its (nonzero) digits is 128000, while the sum is 35.

The square root of 2545540442 is about 50453.3491653428. The cubic root of 2545540442 is about 1365.4003203560.

Adding to 2545540442 its reverse (2440455452), we get a palindrome (4985995894).

The spelling of 2545540442 in words is "two billion, five hundred forty-five million, five hundred forty thousand, four hundred forty-two".