2511768442 has 4 divisors (see below), whose sum is σ = 3767652666. Its totient is φ = 1255884220.

The previous prime is 2511768419. The next prime is 2511768443. The reversal of 2511768442 is 2448671152.

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., 2509108281 + 2660161 = 50091^2 + 1631^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 2511768395 and 2511768404.

It is not an unprimeable number, because it can be changed into a prime (2511768443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627942109 + ... + 627942112.

Almost surely, 2^2511768442 is an apocalyptic number.

2511768442 is a deficient number, since it is larger than the sum of its proper divisors (1255884224).

2511768442 is a wasteful number, since it uses less digits than its factorization.

2511768442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255884223.

The product of its digits is 107520, while the sum is 40.

The square root of 2511768442 is about 50117.5462487939. The cubic root of 2511768442 is about 1359.3351064362.

The spelling of 2511768442 in words is "two billion, five hundred eleven million, seven hundred sixty-eight thousand, four hundred forty-two".