645233053696 has 351 divisors, whose sum is σ = 1660011592743. Its totient is φ = 249847234560.

The previous prime is 645233053693. The next prime is 645233053709. The reversal of 645233053696 is 696350332546.

The square root of 645233053696 is 803264.

It is a perfect power (a square), and thus also a powerful number.

It is not an unprimeable number, because it can be changed into a prime (645233053693) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3958484911 + ... + 3958485073.

Almost surely, 2^645233053696 is an apocalyptic number.

645233053696 is the 803264-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645233053696

645233053696 is an abundant number, since it is smaller than the sum of its proper divisors (1014778539047).

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

645233053696 is an equidigital number, since it uses as much as digits as its factorization.

645233053696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 52.

The spelling of 645233053696 in words is "six hundred forty-five billion, two hundred thirty-three million, fifty-three thousand, six hundred ninety-six".