167680815481 has 4 divisors (see below), whose sum is σ = 167690239312. Its totient is φ = 167671391652.

The previous prime is 167680815479. The next prime is 167680815493. The reversal of 167680815481 is 184518086761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 167680815481 - 2¹ = 167680815479 is a prime.

It is a super-2 number, since 2×167680815481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (167680815431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4685175 + ... + 4720828.

It is an arithmetic number, because the mean of its divisors is an integer number (41922559828).

Almost surely, 2^167680815481 is an apocalyptic number.

It is an amenable number.

167680815481 is a deficient number, since it is larger than the sum of its proper divisors (9423831).

167680815481 is an equidigital number, since it uses as much as digits as its factorization.

167680815481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9423830.

The product of its (nonzero) digits is 2580480, while the sum is 55.

The spelling of 167680815481 in words is "one hundred sixty-seven billion, six hundred eighty million, eight hundred fifteen thousand, four hundred eighty-one".