87236651611 has 4 divisors (see below), whose sum is σ = 87515363272. Its totient is φ = 86957939952.

The previous prime is 87236651603. The next prime is 87236651639. The reversal of 87236651611 is 11615663278.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 87236651611 - 2³ = 87236651603 is a prime.

It is a super-2 number, since 2×87236651611² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87236651681) 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, 139355361 + ... + 139355986.

It is an arithmetic number, because the mean of its divisors is an integer number (21878840818).

Almost surely, 2^87236651611 is an apocalyptic number.

87236651611 is a deficient number, since it is larger than the sum of its proper divisors (278711661).

87236651611 is a wasteful number, since it uses less digits than its factorization.

87236651611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278711660.

The product of its digits is 362880, while the sum is 46.

The spelling of 87236651611 in words is "eighty-seven billion, two hundred thirty-six million, six hundred fifty-one thousand, six hundred eleven".