6506136401 has 4 divisors (see below), whose sum is σ = 6519496512. Its totient is φ = 6492776292.

The previous prime is 6506136397. The next prime is 6506136407. The reversal of 6506136401 is 1046316056.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6506136401 - 2² = 6506136397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6506136407) 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, 6679325 + ... + 6680298.

It is an arithmetic number, because the mean of its divisors is an integer number (1629874128).

Almost surely, 2^6506136401 is an apocalyptic number.

It is an amenable number.

6506136401 is a deficient number, since it is larger than the sum of its proper divisors (13360111).

6506136401 is a wasteful number, since it uses less digits than its factorization.

6506136401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13360110.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 6506136401 is about 80660.6248488071. The cubic root of 6506136401 is about 1866.8426804937.

The spelling of 6506136401 in words is "six billion, five hundred six million, one hundred thirty-six thousand, four hundred one".