78432128842 has 8 divisors (see below), whose sum is σ = 120827874276. Its totient is φ = 38156170752.

The previous prime is 78432128833. The next prime is 78432128861. The reversal of 78432128842 is 24882123487.

It can be written as a sum of positive squares in 2 ways, for example, as 67703519601 + 10728609241 = 260199^2 + 103579^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529946743 + ... + 529946890.

Almost surely, 2^78432128842 is an apocalyptic number.

78432128842 is a deficient number, since it is larger than the sum of its proper divisors (42395745434).

78432128842 is a wasteful number, since it uses less digits than its factorization.

78432128842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059893672.

The product of its digits is 1376256, while the sum is 49.

The spelling of 78432128842 in words is "seventy-eight billion, four hundred thirty-two million, one hundred twenty-eight thousand, eight hundred forty-two".