8228816820537 has 4 divisors (see below), whose sum is σ = 10971755760720. Its totient is φ = 5485877880356.

The previous prime is 8228816820481. The next prime is 8228816820547. The reversal of 8228816820537 is 7350286188228.

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 not a de Polignac number, because 8228816820537 - 2³⁰ = 8227743078713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8228816820547) 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, 1371469470087 + ... + 1371469470092.

It is an arithmetic number, because the mean of its divisors is an integer number (2742938940180).

Almost surely, 2^{8228816820537} is an apocalyptic number.

It is an amenable number.

8228816820537 is a deficient number, since it is larger than the sum of its proper divisors (2742938940183).

8228816820537 is a wasteful number, since it uses less digits than its factorization.

8228816820537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742938940182.

The product of its (nonzero) digits is 20643840, while the sum is 60.

The spelling of 8228816820537 in words is "eight trillion, two hundred twenty-eight billion, eight hundred sixteen million, eight hundred twenty thousand, five hundred thirty-seven".