7811213342605 has 16 divisors (see below), whose sum is σ = 9676047504384. Its totient is φ = 6047252259840.

The previous prime is 7811213342533. The next prime is 7811213342627. The reversal of 7811213342605 is 5062433121187.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-7811213342605 is a prime.

It is a super-2 number, since 2×7811213342605² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6478144 + ... + 7588726.

It is an arithmetic number, because the mean of its divisors is an integer number (604752969024).

Almost surely, 2^{7811213342605} is an apocalyptic number.

It is an amenable number.

7811213342605 is a deficient number, since it is larger than the sum of its proper divisors (1864834161779).

7811213342605 is a wasteful number, since it uses less digits than its factorization.

7811213342605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155996.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 7811213342605 in words is "seven trillion, eight hundred eleven billion, two hundred thirteen million, three hundred forty-two thousand, six hundred five".