645020610192 has 240 divisors, whose sum is σ = 2181375938560. Its totient is φ = 173807970048.

The previous prime is 645020610191. The next prime is 645020610233. The reversal of 645020610192 is 291016020546.

645020610192 is a `hidden beast` number, since 6 + 4 + 5 + 0 + 20 + 610 + 19 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (645020610191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4195383 + ... + 4346409.

Almost surely, 2^645020610192 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 645020610192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1090687969280).

645020610192 is an abundant number, since it is smaller than the sum of its proper divisors (1536355328368).

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

645020610192 is a wasteful number, since it uses less digits than its factorization.

645020610192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151290 (or 151281 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 645020610192 in words is "six hundred forty-five billion, twenty million, six hundred ten thousand, one hundred ninety-two".