78423204003240 has 128 divisors (see below), whose sum is σ = 245732320512000. Its totient is φ = 19984566201600.

The previous prime is 78423204003211. The next prime is 78423204003241. The reversal of 78423204003240 is 4230040232487.

It is a super-2 number, since 2×78423204003240² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78423204003241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10616940 + ... + 16418459.

It is an arithmetic number, because the mean of its divisors is an integer number (1919783754000).

Almost surely, 2^{78423204003240} is an apocalyptic number.

It is an amenable number.

78423204003240 is an abundant number, since it is smaller than the sum of its proper divisors (167309116508760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78423204003240 is a wasteful number, since it uses less digits than its factorization.

78423204003240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27036487 (or 27036483 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 39.

The spelling of 78423204003240 in words is "seventy-eight trillion, four hundred twenty-three billion, two hundred four million, three thousand, two hundred forty".