69980882521 has 9 divisors (see below), whose sum is σ = 76924333983. Its totient is φ = 63616338720.

The previous prime is 69980882471. The next prime is 69980882537. The reversal of 69980882521 is 12528808996.

The square root of 69980882521 is 264539.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 34350544921 + 35630337600 = 185339^2 + 188760^2 .

It is a de Polignac number, because none of the positive numbers 2^k-69980882521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69980882221) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 2897905 + ... + 2921953.

Almost surely, 2^69980882521 is an apocalyptic number.

69980882521 is the 264539-th square number.

69980882521 is the 132270-th centered octagonal number.

It is an amenable number.

69980882521 is a deficient number, since it is larger than the sum of its proper divisors (6943451462).

69980882521 is an frugal number, since it uses more digits than its factorization.

69980882521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48120 (or 24060 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 58.

The spelling of 69980882521 in words is "sixty-nine billion, nine hundred eighty million, eight hundred eighty-two thousand, five hundred twenty-one".