6998578535 has 16 divisors (see below), whose sum is σ = 9046166304. Its totient is φ = 5167124352.

The previous prime is 6998578519. The next prime is 6998578553. The reversal of 6998578535 is 5358758996.

It is not a de Polignac number, because 6998578535 - 2⁴ = 6998578519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469304 + ... + 483986.

It is an arithmetic number, because the mean of its divisors is an integer number (565385394).

Almost surely, 2^6998578535 is an apocalyptic number.

6998578535 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6998578535 is a deficient number, since it is larger than the sum of its proper divisors (2047587769).

6998578535 is a wasteful number, since it uses less digits than its factorization.

6998578535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22034.

The product of its digits is 81648000, while the sum is 65.

The square root of 6998578535 is about 83657.5073439318. The cubic root of 6998578535 is about 1912.8016899723.

The spelling of 6998578535 in words is "six billion, nine hundred ninety-eight million, five hundred seventy-eight thousand, five hundred thirty-five".