689502370944 has 128 divisors (see below), whose sum is σ = 1849535726400. Its totient is φ = 227571830784.

The previous prime is 689502370943. The next prime is 689502370961. The reversal of 689502370944 is 449073205986.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×689502370944² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (689502370943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132670554 + ... + 132675750.

Almost surely, 2^689502370944 is an apocalyptic number.

689502370944 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689502370944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (924767863200).

689502370944 is an abundant number, since it is smaller than the sum of its proper divisors (1160033355456).

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

689502370944 is a wasteful number, since it uses less digits than its factorization.

689502370944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8550 (or 8538 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 57.

The spelling of 689502370944 in words is "six hundred eighty-nine billion, five hundred two million, three hundred seventy thousand, nine hundred forty-four".