7788743779479 has 64 divisors (see below), whose sum is σ = 11328080805888. Its totient is φ = 4731664896000.

The previous prime is 7788743779463. The next prime is 7788743779517. The reversal of 7788743779479 is 9749773478877.

It is not a de Polignac number, because 7788743779479 - 2⁴ = 7788743779463 is a prime.

It is a super-2 number, since 2×7788743779479² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7788743779395 and 7788743779404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7788743779459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2149803262 + ... + 2149806884.

It is an arithmetic number, because the mean of its divisors is an integer number (177001262592).

Almost surely, 2^{7788743779479} is an apocalyptic number.

7788743779479 is a deficient number, since it is larger than the sum of its proper divisors (3539337026409).

7788743779479 is a wasteful number, since it uses less digits than its factorization.

7788743779479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5808.

The product of its digits is 29274835968, while the sum is 87.

The spelling of 7788743779479 in words is "seven trillion, seven hundred eighty-eight billion, seven hundred forty-three million, seven hundred seventy-nine thousand, four hundred seventy-nine".