87435644720868 has 48 divisors (see below), whose sum is σ = 226860593888320. Its totient is φ = 29122639171200.

The previous prime is 87435644720861. The next prime is 87435644720899. The reversal of 87435644720868 is 86802744653478.

87435644720868 is a `hidden beast` number, since 8 + 7 + 4 + 35 + 64 + 472 + 0 + 8 + 68 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 87435644720796 and 87435644720805.

It is not an unprimeable number, because it can be changed into a prime (87435644720861) 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, 313411813 + ... + 313690668.

Almost surely, 2^{87435644720868} is an apocalyptic number.

It is an amenable number.

87435644720868 is an abundant number, since it is smaller than the sum of its proper divisors (139424949167452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87435644720868 is a wasteful number, since it uses less digits than its factorization.

87435644720868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627103785 (or 627103777 counting only the distinct ones).

The product of its (nonzero) digits is 1734082560, while the sum is 72.

The spelling of 87435644720868 in words is "eighty-seven trillion, four hundred thirty-five billion, six hundred forty-four million, seven hundred twenty thousand, eight hundred sixty-eight".