6401740799 has 4 divisors (see below), whose sum is σ = 6550618536. Its totient is φ = 6252863064.

The previous prime is 6401740789. The next prime is 6401740801. The reversal of 6401740799 is 9970471046.

It is a happy number.

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-6401740799 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 (6401740789) 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, 74438804 + ... + 74438889.

It is an arithmetic number, because the mean of its divisors is an integer number (1637654634).

Almost surely, 2^6401740799 is an apocalyptic number.

6401740799 is a deficient number, since it is larger than the sum of its proper divisors (148877737).

6401740799 is a wasteful number, since it uses less digits than its factorization.

6401740799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148877736.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 6401740799 is about 80010.8792540115. The cubic root of 6401740799 is about 1856.8038530434.

The spelling of 6401740799 in words is "six billion, four hundred one million, seven hundred forty thousand, seven hundred ninety-nine".