2541320551138 has 4 divisors (see below), whose sum is σ = 3811980826710. Its totient is φ = 1270660275568.

The previous prime is 2541320551067. The next prime is 2541320551139. The reversal of 2541320551138 is 8311550231452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2424351763089 + 116968788049 = 1557033^2 + 342007^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2541320551138.

It is not an unprimeable number, because it can be changed into a prime (2541320551139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635330137783 + ... + 635330137786.

Almost surely, 2^{2541320551138} is an apocalyptic number.

2541320551138 is a deficient number, since it is larger than the sum of its proper divisors (1270660275572).

2541320551138 is a wasteful number, since it uses less digits than its factorization.

2541320551138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270660275571.

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 2541320551138 in words is "two trillion, five hundred forty-one billion, three hundred twenty million, five hundred fifty-one thousand, one hundred thirty-eight".