78836378227 has 4 divisors (see below), whose sum is σ = 78837396336. Its totient is φ = 78835360120.

The previous prime is 78836378219. The next prime is 78836378261. The reversal of 78836378227 is 72287363887.

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

It is a cyclic number.

It is not a de Polignac number, because 78836378227 - 2³ = 78836378219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78836379227) 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, 382399 + ... + 551272.

It is an arithmetic number, because the mean of its divisors is an integer number (19709349084).

Almost surely, 2^78836378227 is an apocalyptic number.

78836378227 is a deficient number, since it is larger than the sum of its proper divisors (1018109).

78836378227 is an equidigital number, since it uses as much as digits as its factorization.

78836378227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018108.

The product of its digits is 37933056, while the sum is 61.

The spelling of 78836378227 in words is "seventy-eight billion, eight hundred thirty-six million, three hundred seventy-eight thousand, two hundred twenty-seven".