6402127661399 has 4 divisors (see below), whose sum is σ = 6406552077264. Its totient is φ = 6397703245536.

The previous prime is 6402127661393. The next prime is 6402127661407. The reversal of 6402127661399 is 9931667212046.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6402127661399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402127661393) 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, 2212205762 + ... + 2212208655.

It is an arithmetic number, because the mean of its divisors is an integer number (1601638019316).

Almost surely, 2^{6402127661399} is an apocalyptic number.

6402127661399 is a deficient number, since it is larger than the sum of its proper divisors (4424415865).

6402127661399 is a wasteful number, since it uses less digits than its factorization.

6402127661399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4424415864.

The product of its (nonzero) digits is 5878656, while the sum is 56.

The spelling of 6402127661399 in words is "six trillion, four hundred two billion, one hundred twenty-seven million, six hundred sixty-one thousand, three hundred ninety-nine".