626606051640 has 256 divisors, whose sum is σ = 1954804838400. Its totient is φ = 160513228800.

The previous prime is 626606051611. The next prime is 626606051681. The reversal of 626606051640 is 46150606626.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 626606051592 and 626606051601.

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, 530571850 + ... + 530573030.

It is an arithmetic number, because the mean of its divisors is an integer number (7635956400).

Almost surely, 2^626606051640 is an apocalyptic number.

626606051640 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 626606051640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (977402419200).

626606051640 is an abundant number, since it is smaller than the sum of its proper divisors (1328198786760).

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

626606051640 is a wasteful number, since it uses less digits than its factorization.

626606051640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158 (or 2154 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 626606051640 in words is "six hundred twenty-six billion, six hundred six million, fifty-one thousand, six hundred forty".