78196988969187 has 32 divisors (see below), whose sum is σ = 115670720252160. Its totient is φ = 46588121041920.

The previous prime is 78196988969171. The next prime is 78196988969189.

78196988969187 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78196988969187 - 2⁴ = 78196988969171 is a prime.

It is a super-2 number, since 2×78196988969187² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78196988969094 and 78196988969103.

It is not an unprimeable number, because it can be changed into a prime (78196988969189) 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, 138252663 + ... + 138817119.

It is an arithmetic number, because the mean of its divisors is an integer number (3614710007880).

Almost surely, 2^{78196988969187} is an apocalyptic number.

78196988969187 is a deficient number, since it is larger than the sum of its proper divisors (37473731282973).

78196988969187 is a wasteful number, since it uses less digits than its factorization.

78196988969187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635683.

The product of its digits is 47405481984, while the sum is 96.

The spelling of 78196988969187 in words is "seventy-eight trillion, one hundred ninety-six billion, nine hundred eighty-eight million, nine hundred sixty-nine thousand, one hundred eighty-seven".