689961492480 has 896 divisors, whose sum is σ = 2520706728960. Its totient is φ = 159865896960.

The previous prime is 689961492443. The next prime is 689961492491. The reversal of 689961492480 is 84294169986.

It is a super-2 number, since 2×689961492480² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3269959575 + ... + 3269959785.

It is an arithmetic number, because the mean of its divisors is an integer number (2813288760).

Almost surely, 2^689961492480 is an apocalyptic number.

689961492480 is a gapful number since it is divisible by the number (60) 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 689961492480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1260353364480).

689961492480 is an abundant number, since it is smaller than the sum of its proper divisors (1830745236480).

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

689961492480 is a wasteful number, since it uses less digits than its factorization.

689961492480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 66.

The spelling of 689961492480 in words is "six hundred eighty-nine billion, nine hundred sixty-one million, four hundred ninety-two thousand, four hundred eighty".