78507241181812 has 12 divisors (see below), whose sum is σ = 140738590899396. Its totient is φ = 38296215210560.

The previous prime is 78507241181807. The next prime is 78507241181813. The reversal of 78507241181812 is 21818114270587.

It can be written as a sum of positive squares in 2 ways, for example, as 17852365742436 + 60654875439376 = 4225206^2 + 7788124^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78507241181813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239351344903 + ... + 239351345230.

It is an arithmetic number, because the mean of its divisors is an integer number (11728215908283).

Almost surely, 2^{78507241181812} is an apocalyptic number.

It is an amenable number.

78507241181812 is a deficient number, since it is larger than the sum of its proper divisors (62231349717584).

78507241181812 is a wasteful number, since it uses less digits than its factorization.

78507241181812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478702690178 (or 478702690176 counting only the distinct ones).

The product of its (nonzero) digits is 2007040, while the sum is 55.

The spelling of 78507241181812 in words is "seventy-eight trillion, five hundred seven billion, two hundred forty-one million, one hundred eighty-one thousand, eight hundred twelve".