78070967821 has 32 divisors (see below), whose sum is σ = 99277516800. Its totient is φ = 59631698880.

The previous prime is 78070967797. The next prime is 78070967851. The reversal of 78070967821 is 12876907087.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 78070967821 - 2⁵ = 78070967789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78070967851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 799371 + ... + 891703.

It is an arithmetic number, because the mean of its divisors is an integer number (3102422400).

Almost surely, 2^78070967821 is an apocalyptic number.

It is an amenable number.

78070967821 is a deficient number, since it is larger than the sum of its proper divisors (21206548979).

78070967821 is a wasteful number, since it uses less digits than its factorization.

78070967821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92569.

The product of its (nonzero) digits is 2370816, while the sum is 55.

The spelling of 78070967821 in words is "seventy-eight billion, seventy million, nine hundred sixty-seven thousand, eight hundred twenty-one".