68986598409 has 27 divisors (see below), whose sum is σ = 103236105063. Its totient is φ = 44390458224.

The previous prime is 68986598407. The next prime is 68986598411. The reversal of 68986598409 is 90489568986.

The square root of 68986598409 is 262653.

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

It is an interprime number because it is at equal distance from previous prime (68986598407) and next prime (68986598411).

It can be written as a sum of positive squares in only one way, i.e., 36174898809 + 32811699600 = 190197^2 + 181140^2 .

It is not a de Polignac number, because 68986598409 - 2¹ = 68986598407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68986598407) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 22849302 + ... + 22852320.

Almost surely, 2^68986598409 is an apocalyptic number.

68986598409 is the 262653-rd square number.

68986598409 is the 131327-th centered octagonal number.

It is an amenable number.

68986598409 is a deficient number, since it is larger than the sum of its proper divisors (34249506654).

68986598409 is an frugal number, since it uses more digits than its factorization.

68986598409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6102 (or 3051 counting only the distinct ones).

The product of its (nonzero) digits is 268738560, while the sum is 72.

The spelling of 68986598409 in words is "sixty-eight billion, nine hundred eighty-six million, five hundred ninety-eight thousand, four hundred nine".