5126617991 has 8 divisors (see below), whose sum is σ = 5743827984. Its totient is φ = 4534600320.

The previous prime is 5126617987. The next prime is 5126617997. The reversal of 5126617991 is 1997166215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5126617991 - 2² = 5126617987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5126617997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6297650 + ... + 6298463.

It is an arithmetic number, because the mean of its divisors is an integer number (717978498).

Almost surely, 2^5126617991 is an apocalyptic number.

5126617991 is a deficient number, since it is larger than the sum of its proper divisors (617209993).

5126617991 is a wasteful number, since it uses less digits than its factorization.

5126617991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12596161.

The product of its digits is 204120, while the sum is 47.

The square root of 5126617991 is about 71600.4049639386. The cubic root of 5126617991 is about 1724.2900379942.

The spelling of 5126617991 in words is "five billion, one hundred twenty-six million, six hundred seventeen thousand, nine hundred ninety-one".