826878497421 has 8 divisors (see below), whose sum is σ = 1167357878784. Its totient is φ = 518825723840.

The previous prime is 826878497411. The next prime is 826878497539. The reversal of 826878497421 is 124794878628.

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 826878497421 - 2¹⁸ = 826878235277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (826878497411) 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, 8106651885 + ... + 8106651986.

It is an arithmetic number, because the mean of its divisors is an integer number (145919734848).

Almost surely, 2^826878497421 is an apocalyptic number.

It is an amenable number.

826878497421 is a deficient number, since it is larger than the sum of its proper divisors (340479381363).

826878497421 is a wasteful number, since it uses less digits than its factorization.

826878497421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16213303891.

The product of its digits is 86704128, while the sum is 66.

The spelling of 826878497421 in words is "eight hundred twenty-six billion, eight hundred seventy-eight million, four hundred ninety-seven thousand, four hundred twenty-one".