7799511987 has 12 divisors (see below), whose sum is σ = 11273702440. Its totient is φ = 5196102048.

The previous prime is 7799511943. The next prime is 7799512001. The reversal of 7799511987 is 7891159977.

It is a de Polignac number, because none of the positive numbers 2^k-7799511987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7799513987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 283858 + ... + 310119.

Almost surely, 2^7799511987 is an apocalyptic number.

7799511987 is a deficient number, since it is larger than the sum of its proper divisors (3474190453).

7799511987 is a wasteful number, since it uses less digits than its factorization.

7799511987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595442 (or 595439 counting only the distinct ones).

The product of its digits is 10001880, while the sum is 63.

The square root of 7799511987 is about 88314.8457905012. The cubic root of 7799511987 is about 1983.1511218304.

The spelling of 7799511987 in words is "seven billion, seven hundred ninety-nine million, five hundred eleven thousand, nine hundred eighty-seven".