78327672387 has 32 divisors (see below), whose sum is σ = 112321950720. Its totient is φ = 48396268800.

The previous prime is 78327672373. The next prime is 78327672413.

It is a happy number.

78327672387 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78327672387 - 2⁶ = 78327672323 is a prime.

It is a super-2 number, since 2×78327672387² (a number of 23 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 78327672387.

It is not an unprimeable number, because it can be changed into a prime (78327672307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7906137 + ... + 7916037.

It is an arithmetic number, because the mean of its divisors is an integer number (3510060960).

Almost surely, 2^78327672387 is an apocalyptic number.

78327672387 is a deficient number, since it is larger than the sum of its proper divisors (33994278333).

78327672387 is a wasteful number, since it uses less digits than its factorization.

78327672387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12923.

The product of its digits is 33191424, while the sum is 60.

The spelling of 78327672387 in words is "seventy-eight billion, three hundred twenty-seven million, six hundred seventy-two thousand, three hundred eighty-seven".