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645197622 = 23107532937
BaseRepresentation
bin100110011101001…
…110111100110110
31122222001102202020
4212131032330312
52310132310442
6144004454010
721663042426
oct4635167466
91588042666
10645197622
11301219583
121600aa306
13a3892154
1461990486
153b9999ec
hex2674ef36

645197622 has 8 divisors (see below), whose sum is σ = 1290395256. Its totient is φ = 215065872.

The previous prime is 645197593. The next prime is 645197629. The reversal of 645197622 is 226791546.

It is a sphenic number, since it is the product of 3 distinct primes.

645197622 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645197629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53766463 + ... + 53766474.

It is an arithmetic number, because the mean of its divisors is an integer number (161299407).

Almost surely, 2645197622 is an apocalyptic number.

645197622 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

645197622 is a wasteful number, since it uses less digits than its factorization.

645197622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107532942.

The product of its digits is 181440, while the sum is 42.

The square root of 645197622 is about 25400.7405797548. The cubic root of 645197622 is about 864.1004925336.

The spelling of 645197622 in words is "six hundred forty-five million, one hundred ninety-seven thousand, six hundred twenty-two".

Divisors: 1 2 3 6 107532937 215065874 322598811 645197622