167490394981 has 16 divisors (see below), whose sum is σ = 206173271808. Its totient is φ = 132499785600.

The previous prime is 167490394963. The next prime is 167490394987. The reversal of 167490394981 is 189493094761.

It is not a de Polignac number, because 167490394981 - 2⁹ = 167490394469 is a prime.

It is a super-3 number, since 3×167490394981³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167490394987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 479136 + ... + 751366.

It is an arithmetic number, because the mean of its divisors is an integer number (12885829488).

Almost surely, 2^167490394981 is an apocalyptic number.

It is an amenable number.

167490394981 is a deficient number, since it is larger than the sum of its proper divisors (38682876827).

167490394981 is a wasteful number, since it uses less digits than its factorization.

167490394981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279012.

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 167490394981 in words is "one hundred sixty-seven billion, four hundred ninety million, three hundred ninety-four thousand, nine hundred eighty-one".