78215734166340 has 48 divisors (see below), whose sum is σ = 219021168844800. Its totient is φ = 20855899284480.

The previous prime is 78215734166299. The next prime is 78215734166413. The reversal of 78215734166340 is 4366143751287.

78215734166340 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×78215734166340² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50157741 + ... + 51693620.

It is an arithmetic number, because the mean of its divisors is an integer number (4562941017600).

Almost surely, 2^{78215734166340} is an apocalyptic number.

It is an amenable number.

78215734166340 is an abundant number, since it is smaller than the sum of its proper divisors (140805434678460).

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

78215734166340 is a wasteful number, since it uses less digits than its factorization.

78215734166340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101864172 (or 101864170 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 57.

The spelling of 78215734166340 in words is "seventy-eight trillion, two hundred fifteen billion, seven hundred thirty-four million, one hundred sixty-six thousand, three hundred forty".