69890828581 has 8 divisors (see below), whose sum is σ = 82034023040. Its totient is φ = 58287331728.

The previous prime is 69890828551. The next prime is 69890828591. The reversal of 69890828581 is 18582809896.

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 69890828581 - 2⁵ = 69890828549 is a prime.

It is a super-2 number, since 2×69890828581² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69890828551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134924121 + ... + 134924638.

It is an arithmetic number, because the mean of its divisors is an integer number (10254252880).

Almost surely, 2^69890828581 is an apocalyptic number.

It is an amenable number.

69890828581 is a deficient number, since it is larger than the sum of its proper divisors (12143194459).

69890828581 is a wasteful number, since it uses less digits than its factorization.

69890828581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269848803.

The product of its (nonzero) digits is 19906560, while the sum is 64.

The spelling of 69890828581 in words is "sixty-nine billion, eight hundred ninety million, eight hundred twenty-eight thousand, five hundred eighty-one".