78321641432 has 16 divisors (see below), whose sum is σ = 149342113800. Its totient is φ = 38497077760.

The previous prime is 78321641393. The next prime is 78321641459. The reversal of 78321641432 is 23414612387.

It is a super-2 number, since 2×78321641432² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78321641432.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 82967369 + ... + 82968312.

Almost surely, 2^78321641432 is an apocalyptic number.

It is an amenable number.

78321641432 is a deficient number, since it is larger than the sum of its proper divisors (71020472368).

78321641432 is a wasteful number, since it uses less digits than its factorization.

78321641432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165935746 (or 165935742 counting only the distinct ones).

The product of its digits is 193536, while the sum is 41.

The spelling of 78321641432 in words is "seventy-eight billion, three hundred twenty-one million, six hundred forty-one thousand, four hundred thirty-two".