6440254355 has 8 divisors (see below), whose sum is σ = 7732739472. Its totient is φ = 5149247328.

The previous prime is 6440254283. The next prime is 6440254391. The reversal of 6440254355 is 5534520446.

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 6440254355 - 2¹⁴ = 6440237971 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359912 + ... + 377381.

It is an arithmetic number, because the mean of its divisors is an integer number (966592434).

Almost surely, 2^6440254355 is an apocalyptic number.

6440254355 is a deficient number, since it is larger than the sum of its proper divisors (1292485117).

6440254355 is a wasteful number, since it uses less digits than its factorization.

6440254355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739045.

The product of its (nonzero) digits is 288000, while the sum is 38.

The square root of 6440254355 is about 80251.1953493529. The cubic root of 6440254355 is about 1860.5199874841.

The spelling of 6440254355 in words is "six billion, four hundred forty million, two hundred fifty-four thousand, three hundred fifty-five".