7427240812787 has 4 divisors (see below), whose sum is σ = 7432993905336. Its totient is φ = 7421487720240.

The previous prime is 7427240812759. The next prime is 7427240812793. The reversal of 7427240812787 is 7872180427247.

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

It is a cyclic number.

It is not a de Polignac number, because 7427240812787 - 2²⁴ = 7427224035571 is a prime.

It is a super-2 number, since 2×7427240812787² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7427240818787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2876544338 + ... + 2876546919.

It is an arithmetic number, because the mean of its divisors is an integer number (1858248476334).

Almost surely, 2^{7427240812787} is an apocalyptic number.

7427240812787 is a deficient number, since it is larger than the sum of its proper divisors (5753092549).

7427240812787 is a wasteful number, since it uses less digits than its factorization.

7427240812787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5753092548.

The product of its (nonzero) digits is 19668992, while the sum is 59.

The spelling of 7427240812787 in words is "seven trillion, four hundred twenty-seven billion, two hundred forty million, eight hundred twelve thousand, seven hundred eighty-seven".