6405534998 has 8 divisors (see below), whose sum is σ = 9609954480. Its totient is φ = 3202216840.

The previous prime is 6405534997. The next prime is 6405535007. The reversal of 6405534998 is 8994355046.

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

It is a super-2 number, since 2×6405534998² = 82061757221205720008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405534997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260633 + ... + 284148.

It is an arithmetic number, because the mean of its divisors is an integer number (1201244310).

Almost surely, 2^6405534998 is an apocalyptic number.

6405534998 is a deficient number, since it is larger than the sum of its proper divisors (3204419482).

6405534998 is a wasteful number, since it uses less digits than its factorization.

6405534998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550662.

The product of its (nonzero) digits is 4665600, while the sum is 53.

The square root of 6405534998 is about 80034.5862611909. The cubic root of 6405534998 is about 1857.1706122406.

The spelling of 6405534998 in words is "six billion, four hundred five million, five hundred thirty-four thousand, nine hundred ninety-eight".