78830821431 has 64 divisors (see below), whose sum is σ = 126997516800. Its totient is φ = 48134435328.

The previous prime is 78830821429. The next prime is 78830821453. The reversal of 78830821431 is 13412803887.

It is not a de Polignac number, because 78830821431 - 2¹ = 78830821429 is a prime.

It is a super-2 number, since 2×78830821431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78830821471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5459940 + ... + 5474358.

It is an arithmetic number, because the mean of its divisors is an integer number (1984336200).

Almost surely, 2^78830821431 is an apocalyptic number.

78830821431 is a deficient number, since it is larger than the sum of its proper divisors (48166695369).

78830821431 is a wasteful number, since it uses less digits than its factorization.

78830821431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14765 (or 14759 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 78830821431 in words is "seventy-eight billion, eight hundred thirty million, eight hundred twenty-one thousand, four hundred thirty-one".