689724145519 has 4 divisors (see below), whose sum is σ = 702737808696. Its totient is φ = 676710482344.

The previous prime is 689724145507. The next prime is 689724145547. The reversal of 689724145519 is 915541427986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 915541427986 = 2 ⋅457770713993.

It is a cyclic number.

It is not a de Polignac number, because 689724145519 - 2¹⁹ = 689723621231 is a prime.

It is a super-2 number, since 2×689724145519² (a number of 24 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 (689724142519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6506831509 + ... + 6506831614.

It is an arithmetic number, because the mean of its divisors is an integer number (175684452174).

Almost surely, 2^689724145519 is an apocalyptic number.

689724145519 is a deficient number, since it is larger than the sum of its proper divisors (13013663177).

689724145519 is a wasteful number, since it uses less digits than its factorization.

689724145519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13013663176.

The product of its digits is 21772800, while the sum is 61.

The spelling of 689724145519 in words is "six hundred eighty-nine billion, seven hundred twenty-four million, one hundred forty-five thousand, five hundred nineteen".