87653522561 has 4 divisors (see below), whose sum is σ = 95622024624. Its totient is φ = 79685020500.

The previous prime is 87653522543. The next prime is 87653522563. The reversal of 87653522561 is 16522535678.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87653522561 - 2¹⁴ = 87653506177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87653522563) 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, 3984251015 + ... + 3984251036.

It is an arithmetic number, because the mean of its divisors is an integer number (23905506156).

Almost surely, 2^87653522561 is an apocalyptic number.

It is an amenable number.

87653522561 is a deficient number, since it is larger than the sum of its proper divisors (7968502063).

87653522561 is a wasteful number, since it uses less digits than its factorization.

87653522561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7968502062.

The product of its digits is 3024000, while the sum is 50.

The spelling of 87653522561 in words is "eighty-seven billion, six hundred fifty-three million, five hundred twenty-two thousand, five hundred sixty-one".