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138987655099 = 225161744849
BaseRepresentation
bin1000000101110001001…
…1110100111110111011
3111021202021210102121121
42001130103310332323
54234121314430344
6143503335450111
713020146401306
oct2013423647673
9437667712547
10138987655099
1153a429a9467
1222b2a826937
131014cc21b47
146a26dc9b3d
153936e02684
hex205c4f4fbb

138987655099 has 4 divisors (see below), whose sum is σ = 139049402200. Its totient is φ = 138925908000.

The previous prime is 138987655073. The next prime is 138987655129. The reversal of 138987655099 is 990556789831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138987655099 - 25 = 138987655067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138987655049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30870174 + ... + 30874675.

It is an arithmetic number, because the mean of its divisors is an integer number (34762350550).

Almost surely, 2138987655099 is an apocalyptic number.

138987655099 is a deficient number, since it is larger than the sum of its proper divisors (61747101).

138987655099 is an equidigital number, since it uses as much as digits as its factorization.

138987655099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61747100.

The product of its (nonzero) digits is 146966400, while the sum is 70.

The spelling of 138987655099 in words is "one hundred thirty-eight billion, nine hundred eighty-seven million, six hundred fifty-five thousand, ninety-nine".

Divisors: 1 2251 61744849 138987655099