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27019639431 = 327350381761
BaseRepresentation
bin11001001010011111…
…101111101010000111
32120202001012220021100
4121022133233222013
5420314011430211
620225044351143
71644400100661
oct311237575207
976661186240
1027019639431
1110505978024
1252a09a54b3
132717a98b35
1414446b5531
15a82164156
hex64a7efa87

27019639431 has 24 divisors (see below), whose sum is σ = 39642142176. Its totient is φ = 17730800640.

The previous prime is 27019639429. The next prime is 27019639441. The reversal of 27019639431 is 13493691072.

27019639431 is a `hidden beast` number, since 2 + 7 + 0 + 1 + 9 + 639 + 4 + 3 + 1 = 666.

It is not a de Polignac number, because 27019639431 - 21 = 27019639429 is a prime.

It is a super-2 number, since 2×270196394312 (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27019639421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289591 + ... + 371351.

It is an arithmetic number, because the mean of its divisors is an integer number (1651755924).

Almost surely, 227019639431 is an apocalyptic number.

27019639431 is a deficient number, since it is larger than the sum of its proper divisors (12622502745).

27019639431 is a wasteful number, since it uses less digits than its factorization.

27019639431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82343 (or 82340 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The spelling of 27019639431 in words is "twenty-seven billion, nineteen million, six hundred thirty-nine thousand, four hundred thirty-one".

Divisors: 1 3 9 73 219 503 657 1509 4527 36719 81761 110157 245283 330471 735849 5968553 17905659 41125783 53716977 123377349 370132047 3002182159 9006546477 27019639431