87665442953 has 12 divisors (see below), whose sum is σ = 97442239860. Its totient is φ = 78800388480.

The previous prime is 87665442919. The next prime is 87665443001. The reversal of 87665442953 is 35924456678.

It can be written as a sum of positive squares in 2 ways, for example, as 49534288969 + 38131153984 = 222563^2 + 195272^2 .

It is not a de Polignac number, because 87665442953 - 2¹⁸ = 87665180809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87665442892 and 87665442901.

It is not an unprimeable number, because it can be changed into a prime (87665442913) 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, 4059500 + ... + 4081037.

It is an arithmetic number, because the mean of its divisors is an integer number (8120186655).

Almost surely, 2^87665442953 is an apocalyptic number.

It is an amenable number.

87665442953 is a deficient number, since it is larger than the sum of its proper divisors (9776796907).

87665442953 is a wasteful number, since it uses less digits than its factorization.

87665442953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8140648 (or 8140637 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 59.

The spelling of 87665442953 in words is "eighty-seven billion, six hundred sixty-five million, four hundred forty-two thousand, nine hundred fifty-three".