69809890638 has 16 divisors (see below), whose sum is σ = 139730693760. Its totient is φ = 23251478136.

The previous prime is 69809890609. The next prime is 69809890673. The reversal of 69809890638 is 83609890896.

It is a super-3 number, since 3×69809890638³ (a number of 34 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 4613170 + ... + 4628277.

It is an arithmetic number, because the mean of its divisors is an integer number (8733168360).

Almost surely, 2^69809890638 is an apocalyptic number.

69809890638 is an abundant number, since it is smaller than the sum of its proper divisors (69920803122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

69809890638 is a wasteful number, since it uses less digits than its factorization.

69809890638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9242711.

The product of its (nonzero) digits is 40310784, while the sum is 66.

The spelling of 69809890638 in words is "sixty-nine billion, eight hundred nine million, eight hundred ninety thousand, six hundred thirty-eight".