78366338460 has 144 divisors (see below), whose sum is σ = 248698640736. Its totient is φ = 20712609792.

The previous prime is 78366338443. The next prime is 78366338543. The reversal of 78366338460 is 6483366387.

It is a super-2 number, since 2×78366338460² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 78366338397 and 78366338406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 477832 + ... + 620528.

It is an arithmetic number, because the mean of its divisors is an integer number (1727073894).

Almost surely, 2^78366338460 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 78366338460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124349320368).

78366338460 is an abundant number, since it is smaller than the sum of its proper divisors (170332302276).

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

78366338460 is a wasteful number, since it uses less digits than its factorization.

78366338460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142834 (or 142820 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 54.

The spelling of 78366338460 in words is "seventy-eight billion, three hundred sixty-six million, three hundred thirty-eight thousand, four hundred sixty".