67581897063 has 4 divisors (see below), whose sum is σ = 90109196088. Its totient is φ = 45054598040.

The previous prime is 67581897023. The next prime is 67581897067. The reversal of 67581897063 is 36079818576.

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

It is a cyclic number.

It is not a de Polignac number, because 67581897063 - 2¹⁷ = 67581765991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67581896988 and 67581897006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67581897067) 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, 11263649508 + ... + 11263649513.

It is an arithmetic number, because the mean of its divisors is an integer number (22527299022).

Almost surely, 2^67581897063 is an apocalyptic number.

67581897063 is a deficient number, since it is larger than the sum of its proper divisors (22527299025).

67581897063 is a wasteful number, since it uses less digits than its factorization.

67581897063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22527299024.

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 67581897063 in words is "sixty-seven billion, five hundred eighty-one million, eight hundred ninety-seven thousand, sixty-three".