689049449070 has 64 divisors (see below), whose sum is σ = 1713333003840. Its totient is φ = 177141888000.

The previous prime is 689049449069. The next prime is 689049449089. The reversal of 689049449070 is 70944940986.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 689049448995 and 689049449013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24031 + ... + 1174170.

It is an arithmetic number, because the mean of its divisors is an integer number (26770828185).

Almost surely, 2^689049449070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689049449070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (856666501920).

689049449070 is an abundant number, since it is smaller than the sum of its proper divisors (1024283554770).

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

689049449070 is a wasteful number, since it uses less digits than its factorization.

689049449070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198901.

The product of its (nonzero) digits is 15676416, while the sum is 60.

The spelling of 689049449070 in words is "six hundred eighty-nine billion, forty-nine million, four hundred forty-nine thousand, seventy".