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640794211799 = 7293156621733
BaseRepresentation
bin10010101001100100100…
…11111011010111010111
32021021000001100201202112
421110302103323113113
540444321304234144
61210213215501235
764203322634060
oct11246223732727
92237001321675
10640794211799
11227839699725
12a423482781b
1348571417181
142302c111567
1511a0643699e
hex95324fb5d7

640794211799 has 8 divisors (see below), whose sum is σ = 757589216160. Its totient is φ = 530312450976.

The previous prime is 640794211789. The next prime is 640794211801. The reversal of 640794211799 is 997112497046.

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

It is a de Polignac number, because none of the positive numbers 2k-640794211799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640794211789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1578310664 + ... + 1578311069.

It is an arithmetic number, because the mean of its divisors is an integer number (94698652020).

Almost surely, 2640794211799 is an apocalyptic number.

640794211799 is a deficient number, since it is larger than the sum of its proper divisors (116795004361).

640794211799 is a wasteful number, since it uses less digits than its factorization.

640794211799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3156621769.

The product of its (nonzero) digits is 6858432, while the sum is 59.

The spelling of 640794211799 in words is "six hundred forty billion, seven hundred ninety-four million, two hundred eleven thousand, seven hundred ninety-nine".

Divisors: 1 7 29 203 3156621733 22096352131 91542030257 640794211799