78328904187 has 16 divisors (see below), whose sum is σ = 104556029472. Its totient is φ = 52160563200.

The previous prime is 78328904123. The next prime is 78328904197. The reversal of 78328904187 is 78140982387.

It is not a de Polignac number, because 78328904187 - 2⁶ = 78328904123 is a prime.

It is a super-2 number, since 2×78328904187² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78328904197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16889833 + ... + 16894469.

It is an arithmetic number, because the mean of its divisors is an integer number (6534751842).

Almost surely, 2^78328904187 is an apocalyptic number.

78328904187 is a deficient number, since it is larger than the sum of its proper divisors (26227125285).

78328904187 is a wasteful number, since it uses less digits than its factorization.

78328904187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9758.

The product of its (nonzero) digits is 5419008, while the sum is 57.

The spelling of 78328904187 in words is "seventy-eight billion, three hundred twenty-eight million, nine hundred four thousand, one hundred eighty-seven".