78547067636 has 12 divisors (see below), whose sum is σ = 137479507620. Its totient is φ = 39267208320.

The previous prime is 78547067633. The next prime is 78547067653. The reversal of 78547067636 is 63676074587.

It can be written as a sum of positive squares in 2 ways, for example, as 33945851536 + 44601216100 = 184244^2 + 211190^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78547067633) 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, 1553381 + ... + 1603148.

It is an arithmetic number, because the mean of its divisors is an integer number (11456625635).

Almost surely, 2^78547067636 is an apocalyptic number.

It is an amenable number.

78547067636 is a deficient number, since it is larger than the sum of its proper divisors (58932439984).

78547067636 is a wasteful number, since it uses less digits than its factorization.

78547067636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3162754 (or 3162752 counting only the distinct ones).

The product of its (nonzero) digits is 35562240, while the sum is 59.

The spelling of 78547067636 in words is "seventy-eight billion, five hundred forty-seven million, sixty-seven thousand, six hundred thirty-six".