683786621490 has 384 divisors, whose sum is σ = 1974758123520. Its totient is φ = 151031688192.

The previous prime is 683786621473. The next prime is 683786621501. The reversal of 683786621490 is 94126687386.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1904697931 + ... + 1904698289.

It is an arithmetic number, because the mean of its divisors is an integer number (5142599280).

Almost surely, 2^683786621490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 683786621490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (987379061760).

683786621490 is an abundant number, since it is smaller than the sum of its proper divisors (1290971502030).

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

683786621490 is a wasteful number, since it uses less digits than its factorization.

683786621490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 60.

The spelling of 683786621490 in words is "six hundred eighty-three billion, seven hundred eighty-six million, six hundred twenty-one thousand, four hundred ninety".