828437939078399 has 4 divisors (see below), whose sum is σ = 892163934392136. Its totient is φ = 764711943764664.

The previous prime is 828437939078363. The next prime is 828437939078423. The reversal of 828437939078399 is 993870939734828.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-828437939078399 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 (828437939078329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31862997656849 + ... + 31862997656874.

It is an arithmetic number, because the mean of its divisors is an integer number (223040983598034).

Almost surely, 2^{828437939078399} is an apocalyptic number.

828437939078399 is a deficient number, since it is larger than the sum of its proper divisors (63725995313737).

828437939078399 is a wasteful number, since it uses less digits than its factorization.

828437939078399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63725995313736.

The product of its (nonzero) digits is 35554111488, while the sum is 89.

The spelling of 828437939078399 in words is "eight hundred twenty-eight trillion, four hundred thirty-seven billion, nine hundred thirty-nine million, seventy-eight thousand, three hundred ninety-nine".