78237205812 has 288 divisors, whose sum is σ = 218899699200. Its totient is φ = 23484764160.

The previous prime is 78237205799. The next prime is 78237205819. The reversal of 78237205812 is 21850273287.

It is a super-2 number, since 2×78237205812² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78237205819) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 249958968 + ... + 249959280.

It is an arithmetic number, because the mean of its divisors is an integer number (760068400).

Almost surely, 2^78237205812 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 78237205812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109449849600).

78237205812 is an abundant number, since it is smaller than the sum of its proper divisors (140662493388).

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

78237205812 is a wasteful number, since it uses less digits than its factorization.

78237205812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 78237205812 in words is "seventy-eight billion, two hundred thirty-seven million, two hundred five thousand, eight hundred twelve".