78152312207181 has 16 divisors (see below), whose sum is σ = 107864909242560. Its totient is φ = 50272915539840.

The previous prime is 78152312207171. The next prime is 78152312207191. The reversal of 78152312207181 is 18170221325187.

It is an interprime number because it is at equal distance from previous prime (78152312207171) and next prime (78152312207191).

It is not a de Polignac number, because 78152312207181 - 2³⁰ = 78151238465357 is a prime.

It is a super-2 number, since 2×78152312207181² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78152312207181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78152312207171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285764800 + ... + 286038153.

It is an arithmetic number, because the mean of its divisors is an integer number (6741556827660).

Almost surely, 2^{78152312207181} is an apocalyptic number.

It is an amenable number.

78152312207181 is a deficient number, since it is larger than the sum of its proper divisors (29712597035379).

78152312207181 is a wasteful number, since it uses less digits than its factorization.

78152312207181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571804556.

The product of its (nonzero) digits is 376320, while the sum is 48.

The spelling of 78152312207181 in words is "seventy-eight trillion, one hundred fifty-two billion, three hundred twelve million, two hundred seven thousand, one hundred eighty-one".