78321520234 has 8 divisors (see below), whose sum is σ = 117484593408. Its totient is φ = 39159989100.

The previous prime is 78321520183. The next prime is 78321520237. The reversal of 78321520234 is 43202512387.

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

It is a super-3 number, since 3×78321520234³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 78321520193 and 78321520202.

It is not an unprimeable number, because it can be changed into a prime (78321520237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248842 + ... + 467509.

It is an arithmetic number, because the mean of its divisors is an integer number (14685574176).

Almost surely, 2^78321520234 is an apocalyptic number.

78321520234 is a deficient number, since it is larger than the sum of its proper divisors (39163073174).

78321520234 is a wasteful number, since it uses less digits than its factorization.

78321520234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771020.

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 78321520234 in words is "seventy-eight billion, three hundred twenty-one million, five hundred twenty thousand, two hundred thirty-four".