167978384613 has 12 divisors (see below), whose sum is σ = 261299709580. Its totient is φ = 103371313536.

The previous prime is 167978384579. The next prime is 167978384657. The reversal of 167978384613 is 316483879761.

167978384613 is a `hidden beast` number, since 1 + 6 + 7 + 9 + 7 + 8 + 3 + 8 + 4 + 613 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 29964648609 + 138013736004 = 173103^2 + 371502^2 .

It is not a de Polignac number, because 167978384613 - 2¹⁰ = 167978383589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167978384663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 717856228 + ... + 717856461.

Almost surely, 2^167978384613 is an apocalyptic number.

167978384613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

167978384613 is a deficient number, since it is larger than the sum of its proper divisors (93321324967).

167978384613 is a wasteful number, since it uses less digits than its factorization.

167978384613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435712708 (or 1435712705 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 63.

The spelling of 167978384613 in words is "one hundred sixty-seven billion, nine hundred seventy-eight million, three hundred eighty-four thousand, six hundred thirteen".