256106500650 has 720 divisors, whose sum is σ = 962836207872. Its totient is φ = 49114771200.

The previous prime is 256106500631. The next prime is 256106500679. The reversal of 256106500650 is 56005601652.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 44591679 + ... + 44597421.

Almost surely, 2^256106500650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256106500650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (481418103936).

256106500650 is an abundant number, since it is smaller than the sum of its proper divisors (706729707222).

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

256106500650 is a wasteful number, since it uses less digits than its factorization.

256106500650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5809 (or 5784 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 256106500650 in words is "two hundred fifty-six billion, one hundred six million, five hundred thousand, six hundred fifty".