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87693937942 = 21319177518093
BaseRepresentation
bin101000110101011110…
…1110100110100010110
322101100112121121200111
41101222331310310112
52414044122003232
6104141441233234
76223065113362
oct1215275646426
9271315547614
1087693937942
1134210a3a586
1214bb463281a
138367136b10
14435c9322a2
152433bae047
hex146af74d16

87693937942 has 16 divisors (see below), whose sum is σ = 149115198960. Its totient is φ = 38343907872.

The previous prime is 87693937937. The next prime is 87693937993. The reversal of 87693937942 is 24973939678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88758553 + ... + 88759540.

It is an arithmetic number, because the mean of its divisors is an integer number (9319699935).

Almost surely, 287693937942 is an apocalyptic number.

87693937942 is a deficient number, since it is larger than the sum of its proper divisors (61421261018).

87693937942 is a wasteful number, since it uses less digits than its factorization.

87693937942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177518127.

The product of its digits is 123451776, while the sum is 67.

The spelling of 87693937942 in words is "eighty-seven billion, six hundred ninety-three million, nine hundred thirty-seven thousand, nine hundred forty-two".

Divisors: 1 2 13 19 26 38 247 494 177518093 355036186 2307735209 3372843767 4615470418 6745687534 43846968971 87693937942