2540620542 has 16 divisors (see below), whose sum is σ = 5094512640. Its totient is φ = 844661592.

The previous prime is 2540620517. The next prime is 2540620591. The reversal of 2540620542 is 2450260452.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550492 + ... + 555087.

It is an arithmetic number, because the mean of its divisors is an integer number (318407040).

Almost surely, 2^2540620542 is an apocalyptic number.

2540620542 is an abundant number, since it is smaller than the sum of its proper divisors (2553892098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2540620542 is a wasteful number, since it uses less digits than its factorization.

2540620542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105967.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 2540620542 is about 50404.5686619775. The cubic root of 2540620542 is about 1364.5200926685.

Adding to 2540620542 its reverse (2450260452), we get a palindrome (4990880994).

The spelling of 2540620542 in words is "two billion, five hundred forty million, six hundred twenty thousand, five hundred forty-two".