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87467416431 = 31713487127163
BaseRepresentation
bin101000101110101110…
…1101101101101101111
322100202202101010120220
41101131131231231233
52413113124311211
6104103150142423
76214344525663
oct1213535555557
9270682333526
1087467416431
113410509261a
1214b507b1a13
13832c224c15
14433a8088a3
15241dd66806
hex145d76db6f

87467416431 has 16 divisors (see below), whose sum is σ = 123493538304. Its totient is φ = 54877015424.

The previous prime is 87467416369. The next prime is 87467416483. The reversal of 87467416431 is 13461476478.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 87467416431 - 211 = 87467414383 is a prime.

It is a super-2 number, since 2×874674164312 (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87467416031) 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, 624256 + ... + 751418.

It is an arithmetic number, because the mean of its divisors is an integer number (7718346144).

Almost surely, 287467416431 is an apocalyptic number.

87467416431 is a deficient number, since it is larger than the sum of its proper divisors (36026121873).

87467416431 is a wasteful number, since it uses less digits than its factorization.

87467416431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140670.

The product of its digits is 2709504, while the sum is 51.

The spelling of 87467416431 in words is "eighty-seven billion, four hundred sixty-seven million, four hundred sixteen thousand, four hundred thirty-one".

Divisors: 1 3 17 51 13487 40461 127163 229279 381489 687837 2161771 6485313 1715047381 5145142143 29155805477 87467416431