6401839187 has 2 divisors, whose sum is σ = 6401839188. Its totient is φ = 6401839186.

The previous prime is 6401839133. The next prime is 6401839201. The reversal of 6401839187 is 7819381046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6401839187 - 2⁸ = 6401838931 is a prime.

It is not a weakly prime, because it can be changed into another prime (6401839127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200919593 + 3200919594.

It is an arithmetic number, because the mean of its divisors is an integer number (3200919594).

Almost surely, 2^6401839187 is an apocalyptic number.

6401839187 is a deficient number, since it is larger than the sum of its proper divisors (1).

6401839187 is an equidigital number, since it uses as much as digits as its factorization.

6401839187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 6401839187 is about 80011.4940930364. The cubic root of 6401839187 is about 1856.8133653665.

The spelling of 6401839187 in words is "six billion, four hundred one million, eight hundred thirty-nine thousand, one hundred eighty-seven".