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87681459896 = 2374171477711
BaseRepresentation
bin101000110101000111…
…0001110011010111000
322101022200010200000122
41101222032032122320
52414032423204041
6104140313552412
76222554053262
oct1215216163270
9271280120018
1087681459896
1134204997648
1214bb0415708
138364688364
14435b004b32
152432a46c4b
hex146a38e6b8

87681459896 has 16 divisors (see below), whose sum is σ = 164425014240. Its totient is φ = 43834789440.

The previous prime is 87681459883. The next prime is 87681459907. The reversal of 87681459896 is 69895418678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 679520 + ... + 798191.

It is an arithmetic number, because the mean of its divisors is an integer number (10276563390).

Almost surely, 287681459896 is an apocalyptic number.

It is an amenable number.

87681459896 is a deficient number, since it is larger than the sum of its proper divisors (76743554344).

87681459896 is a wasteful number, since it uses less digits than its factorization.

87681459896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485134 (or 1485130 counting only the distinct ones).

The product of its digits is 209018880, while the sum is 71.

The spelling of 87681459896 in words is "eighty-seven billion, six hundred eighty-one million, four hundred fifty-nine thousand, eight hundred ninety-six".

Divisors: 1 2 4 8 7417 14834 29668 59336 1477711 2955422 5910844 11821688 10960182487 21920364974 43840729948 87681459896