6400187585801 has 2 divisors, whose sum is σ = 6400187585802. Its totient is φ = 6400187585800.

The previous prime is 6400187585677. The next prime is 6400187585851. The reversal of 6400187585801 is 1085857810046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5917129225225 + 483058360576 = 2432515^2 + 695024^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6400187585801 is a prime.

It is a super-2 number, since 2×6400187585801² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6400187585851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200093792900 + 3200093792901.

It is an arithmetic number, because the mean of its divisors is an integer number (3200093792901).

Almost surely, 2^{6400187585801} is an apocalyptic number.

It is an amenable number.

6400187585801 is a deficient number, since it is larger than the sum of its proper divisors (1).

6400187585801 is an equidigital number, since it uses as much as digits as its factorization.

6400187585801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2150400, while the sum is 53.

The spelling of 6400187585801 in words is "six trillion, four hundred billion, one hundred eighty-seven million, five hundred eighty-five thousand, eight hundred one".