78378023412 has 96 divisors (see below), whose sum is σ = 219061046400. Its totient is φ = 24091209216.

The previous prime is 78378023407. The next prime is 78378023429. The reversal of 78378023412 is 21432087387.

It is a super-2 number, since 2×78378023412² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1343139 + ... + 1400277.

It is an arithmetic number, because the mean of its divisors is an integer number (2281885900).

Almost surely, 2^78378023412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78378023412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109530523200).

78378023412 is an abundant number, since it is smaller than the sum of its proper divisors (140683022988).

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

78378023412 is a wasteful number, since it uses less digits than its factorization.

78378023412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58142 (or 58134 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 78378023412 in words is "seventy-eight billion, three hundred seventy-eight million, twenty-three thousand, four hundred twelve".