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16645140359 = 509227314387
BaseRepresentation
bin11111000000010000…
…01010111110000111
31120222000202201222222
433200020022332013
5233042123442414
611351403042555
71126324234001
oct174010127607
946860681888
1016645140359
117071825351
12328651045b
1317536282a3
14b3c909371
1567647d68e
hex3e020af87

16645140359 has 8 divisors (see below), whose sum is σ = 16686339120. Its totient is φ = 16603975936.

The previous prime is 16645140349. The next prime is 16645140431. The reversal of 16645140359 is 95304154661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-16645140359 is a prime.

It is a super-3 number, since 3×166451403593 (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16645140349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1149764 + ... + 1164150.

It is an arithmetic number, because the mean of its divisors is an integer number (2085792390).

Almost surely, 216645140359 is an apocalyptic number.

16645140359 is a deficient number, since it is larger than the sum of its proper divisors (41198761).

16645140359 is a wasteful number, since it uses less digits than its factorization.

16645140359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17169.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 16645140359 in words is "sixteen billion, six hundred forty-five million, one hundred forty thousand, three hundred fifty-nine".

Divisors: 1 509 2273 14387 1156957 7322983 32701651 16645140359