87146900821705 has 4 divisors (see below), whose sum is σ = 104576280986052. Its totient is φ = 69717520657360.

The previous prime is 87146900821661. The next prime is 87146900821807. The reversal of 87146900821705 is 50712800964178.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51126689985849 + 36020210835856 = 7150293^2 + 6001684^2 .

It is a de Polignac number, because none of the positive numbers 2^k-87146900821705 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87146900821705.

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, 8714690082166 + ... + 8714690082175.

It is an arithmetic number, because the mean of its divisors is an integer number (26144070246513).

Almost surely, 2^{87146900821705} is an apocalyptic number.

It is an amenable number.

87146900821705 is a deficient number, since it is larger than the sum of its proper divisors (17429380164347).

87146900821705 is a wasteful number, since it uses less digits than its factorization.

87146900821705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17429380164346.

The product of its (nonzero) digits is 6773760, while the sum is 58.

The spelling of 87146900821705 in words is "eighty-seven trillion, one hundred forty-six billion, nine hundred million, eight hundred twenty-one thousand, seven hundred five".