8226991537 has 4 divisors (see below), whose sum is σ = 8227514880. Its totient is φ = 8226468196.

The previous prime is 8226991501. The next prime is 8226991559. The reversal of 8226991537 is 7351996228.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8226991537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8226991567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237337 + ... + 269782.

It is an arithmetic number, because the mean of its divisors is an integer number (2056878720).

Almost surely, 2^8226991537 is an apocalyptic number.

It is an amenable number.

8226991537 is a deficient number, since it is larger than the sum of its proper divisors (523343).

8226991537 is a wasteful number, since it uses less digits than its factorization.

8226991537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523342.

The product of its digits is 1632960, while the sum is 52.

The square root of 8226991537 is about 90702.7647704302. The cubic root of 8226991537 is about 2018.7398225202.

The spelling of 8226991537 in words is "eight billion, two hundred twenty-six million, nine hundred ninety-one thousand, five hundred thirty-seven".