7439821378811 has 2 divisors, whose sum is σ = 7439821378812. Its totient is φ = 7439821378810.

The previous prime is 7439821378799. The next prime is 7439821378831. The reversal of 7439821378811 is 1188731289347.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7439821378811 - 2³⁴ = 7422641509627 is a prime.

It is a super-2 number, since 2×7439821378811² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7439821378831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3719910689405 + 3719910689406.

It is an arithmetic number, because the mean of its divisors is an integer number (3719910689406).

Almost surely, 2^{7439821378811} is an apocalyptic number.

7439821378811 is a deficient number, since it is larger than the sum of its proper divisors (1).

7439821378811 is an equidigital number, since it uses as much as digits as its factorization.

7439821378811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16257024, while the sum is 62.

The spelling of 7439821378811 in words is "seven trillion, four hundred thirty-nine billion, eight hundred twenty-one million, three hundred seventy-eight thousand, eight hundred eleven".