645425202433536 has 320 divisors, whose sum is σ = 2183921212239360. Its totient is φ = 184365923696640.

The previous prime is 645425202433523. The next prime is 645425202433537. The reversal of 645425202433536 is 635334202524546.

645425202433536 is a `hidden beast` number, since 6 + 4 + 5 + 4 + 2 + 52 + 0 + 24 + 33 + 536 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645425202433537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 432873175 + ... + 434361641.

It is an arithmetic number, because the mean of its divisors is an integer number (6824753788248).

Almost surely, 2^{645425202433536} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645425202433536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1091960606119680).

645425202433536 is an abundant number, since it is smaller than the sum of its proper divisors (1538496009805824).

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

645425202433536 is a wasteful number, since it uses less digits than its factorization.

645425202433536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492982 (or 1492960 counting only the distinct ones).

The product of its (nonzero) digits is 62208000, while the sum is 54.

The spelling of 645425202433536 in words is "six hundred forty-five trillion, four hundred twenty-five billion, two hundred two million, four hundred thirty-three thousand, five hundred thirty-six".