67452404981 has 4 divisors (see below), whose sum is σ = 72641051532. Its totient is φ = 62263758432.

The previous prime is 67452404951. The next prime is 67452405047. The reversal of 67452404981 is 18940425476.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22268100625 + 45184304356 = 149225^2 + 212566^2 .

It is a cyclic number.

It is not a de Polignac number, because 67452404981 - 2³⁰ = 66378663157 is a prime.

It is a super-2 number, since 2×67452404981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67452404941) 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, 2594323256 + ... + 2594323281.

It is an arithmetic number, because the mean of its divisors is an integer number (18160262883).

Almost surely, 2^67452404981 is an apocalyptic number.

It is an amenable number.

67452404981 is a deficient number, since it is larger than the sum of its proper divisors (5188646551).

67452404981 is a wasteful number, since it uses less digits than its factorization.

67452404981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5188646550.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 67452404981 in words is "sixty-seven billion, four hundred fifty-two million, four hundred four thousand, nine hundred eighty-one".