7775999999999 has 24 divisors (see below), whose sum is σ = 9868447209600. Its totient is φ = 6058868711280.

The previous prime is 7775999999981. The next prime is 7776000000007. The reversal of 7775999999999 is 9999999995777.

It is a happy number.

It is not a de Polignac number, because 7775999999999 - 2⁸ = 7775999999743 is a prime.

7775999999999 is a modest number, since divided by 9999999 gives 777599 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 7775999999896 and 7775999999905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7775999999939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9064742 + ... + 9885420.

It is an arithmetic number, because the mean of its divisors is an integer number (411185300400).

Almost surely, 2^{7775999999999} is an apocalyptic number.

7775999999999 is a deficient number, since it is larger than the sum of its proper divisors (2092447209601).

7775999999999 is a wasteful number, since it uses less digits than its factorization.

7775999999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838283 (or 838276 counting only the distinct ones).

The product of its digits is 664426138635, while the sum is 107.

The spelling of 7775999999999 in words is "seven trillion, seven hundred seventy-five billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".