828520766457 has 4 divisors (see below), whose sum is σ = 1104694355280. Its totient is φ = 552347177636.

The previous prime is 828520766449. The next prime is 828520766503. The reversal of 828520766457 is 754667025828.

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 828520766457 - 2³ = 828520766449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 828520766457.

It is not an unprimeable number, because it can be changed into a prime (828520761457) 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, 138086794407 + ... + 138086794412.

It is an arithmetic number, because the mean of its divisors is an integer number (276173588820).

Almost surely, 2^828520766457 is an apocalyptic number.

It is an amenable number.

828520766457 is a deficient number, since it is larger than the sum of its proper divisors (276173588823).

828520766457 is a wasteful number, since it uses less digits than its factorization.

828520766457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276173588822.

The product of its (nonzero) digits is 45158400, while the sum is 60.

The spelling of 828520766457 in words is "eight hundred twenty-eight billion, five hundred twenty million, seven hundred sixty-six thousand, four hundred fifty-seven".