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87145319597 = 7231013534329
BaseRepresentation
bin101000100101001000…
…1000000110010101101
322022221022021220210112
41101022101000302231
52411433200211342
6104011202345405
76203353665110
oct1211221006255
9268838256715
1087145319597
1133a5a296496
1214a8095b265
1382aa58b48b
144309b22577
152400940682
hex144a440cad

87145319597 has 16 divisors (see below), whose sum is σ = 104027639040. Its totient is φ = 71377671552.

The previous prime is 87145319461. The next prime is 87145319603. The reversal of 87145319597 is 79591354178.

It is not a de Polignac number, because 87145319597 - 210 = 87145318573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87145319197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104072 + ... + 430257.

It is an arithmetic number, because the mean of its divisors is an integer number (6501727440).

Almost surely, 287145319597 is an apocalyptic number.

It is an amenable number.

87145319597 is a deficient number, since it is larger than the sum of its proper divisors (16882319443).

87145319597 is a wasteful number, since it uses less digits than its factorization.

87145319597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535372.

The product of its digits is 9525600, while the sum is 59.

The spelling of 87145319597 in words is "eighty-seven billion, one hundred forty-five million, three hundred nineteen thousand, five hundred ninety-seven".

Divisors: 1 7 23 161 1013 7091 23299 163093 534329 3740303 12289567 86026969 541275277 3788926939 12449331371 87145319597