78472023161186 has 4 divisors (see below), whose sum is σ = 117708034741782. Its totient is φ = 39236011580592.

The previous prime is 78472023161171. The next prime is 78472023161219. The reversal of 78472023161186 is 68116132027487.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 54191461405225 + 24280561755961 = 7361485^2 + 4927531^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19618005790295 + ... + 19618005790298.

Almost surely, 2^{78472023161186} is an apocalyptic number.

78472023161186 is a deficient number, since it is larger than the sum of its proper divisors (39236011580596).

78472023161186 is a wasteful number, since it uses less digits than its factorization.

78472023161186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39236011580595.

The product of its (nonzero) digits is 5419008, while the sum is 56.

The spelling of 78472023161186 in words is "seventy-eight trillion, four hundred seventy-two billion, twenty-three million, one hundred sixty-one thousand, one hundred eighty-six".