87508751643 has 12 divisors (see below), whose sum is σ = 128001550560. Its totient is φ = 57600696816.

The previous prime is 87508751593. The next prime is 87508751683. The reversal of 87508751643 is 34615780578.

It is a happy number.

87508751643 is a `hidden beast` number, since 8 + 7 + 5 + 0 + 87 + 516 + 43 = 666.

It is not a de Polignac number, because 87508751643 - 2⁶ = 87508751579 is a prime.

It is a super-3 number, since 3×87508751643³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 87508751643.

It is not an unprimeable number, because it can be changed into a prime (87508751683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61538496 + ... + 61539917.

It is an arithmetic number, because the mean of its divisors is an integer number (10666795880).

Almost surely, 2^87508751643 is an apocalyptic number.

87508751643 is a deficient number, since it is larger than the sum of its proper divisors (40492798917).

87508751643 is a wasteful number, since it uses less digits than its factorization.

87508751643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123078498 (or 123078495 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 54.

The spelling of 87508751643 in words is "eighty-seven billion, five hundred eight million, seven hundred fifty-one thousand, six hundred forty-three".