6401356379 has 16 divisors (see below), whose sum is σ = 7246381824. Its totient is φ = 5603992800.

The previous prime is 6401356369. The next prime is 6401356391. The reversal of 6401356379 is 9736531046.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6401356379 - 2⁸ = 6401356123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6401356319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61724 + ... + 128889.

It is an arithmetic number, because the mean of its divisors is an integer number (452898864).

Almost surely, 2^6401356379 is an apocalyptic number.

6401356379 is a deficient number, since it is larger than the sum of its proper divisors (845025445).

6401356379 is a wasteful number, since it uses less digits than its factorization.

6401356379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190738.

The product of its (nonzero) digits is 408240, while the sum is 44.

The square root of 6401356379 is about 80008.4769196365. The cubic root of 6401356379 is about 1856.7666857141.

The spelling of 6401356379 in words is "six billion, four hundred one million, three hundred fifty-six thousand, three hundred seventy-nine".