4006812072391 has 2 divisors, whose sum is σ = 4006812072392. Its totient is φ = 4006812072390.

The previous prime is 4006812072359. The next prime is 4006812072407. The reversal of 4006812072391 is 1932702186004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4006812072391 - 2⁵ = 4006812072359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4006812072091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2003406036195 + 2003406036196.

It is an arithmetic number, because the mean of its divisors is an integer number (2003406036196).

Almost surely, 2^{4006812072391} is an apocalyptic number.

4006812072391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4006812072391 is an equidigital number, since it uses as much as digits as its factorization.

4006812072391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 4006812072391 in words is "four trillion, six billion, eight hundred twelve million, seventy-two thousand, three hundred ninety-one".