6440562998 has 8 divisors (see below), whose sum is σ = 9663594192. Its totient is φ = 3219364936.

The previous prime is 6440562977. The next prime is 6440563009. The reversal of 6440562998 is 8992650446.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449465 + ... + 463572.

It is an arithmetic number, because the mean of its divisors is an integer number (1207949274).

Almost surely, 2^6440562998 is an apocalyptic number.

6440562998 is a deficient number, since it is larger than the sum of its proper divisors (3223031194).

6440562998 is a wasteful number, since it uses less digits than its factorization.

6440562998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916566.

The product of its (nonzero) digits is 3732480, while the sum is 53.

The square root of 6440562998 is about 80253.1183070166. The cubic root of 6440562998 is about 1860.5497082201.

The spelling of 6440562998 in words is "six billion, four hundred forty million, five hundred sixty-two thousand, nine hundred ninety-eight".