6440412017723 has 8 divisors (see below), whose sum is σ = 6454912270896. Its totient is φ = 6425917388800.

The previous prime is 6440412017671. The next prime is 6440412017771. The reversal of 6440412017723 is 3277102140446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6440412017723 - 2²⁶ = 6440344908859 is a prime.

It is a super-2 number, since 2×6440412017723² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6440412014723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 890963 + ... + 3697923.

It is an arithmetic number, because the mean of its divisors is an integer number (806864033862).

Almost surely, 2^{6440412017723} is an apocalyptic number.

6440412017723 is a deficient number, since it is larger than the sum of its proper divisors (14500253173).

6440412017723 is a wasteful number, since it uses less digits than its factorization.

6440412017723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812125.

The product of its (nonzero) digits is 225792, while the sum is 41.

The spelling of 6440412017723 in words is "six trillion, four hundred forty billion, four hundred twelve million, seventeen thousand, seven hundred twenty-three".