87736409651 has 4 divisors (see below), whose sum is σ = 95712446904. Its totient is φ = 79760372400.

The previous prime is 87736409647. The next prime is 87736409681. The reversal of 87736409651 is 15690463778.

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 87736409651 - 2² = 87736409647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87736409681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3988018610 + ... + 3988018631.

It is an arithmetic number, because the mean of its divisors is an integer number (23928111726).

Almost surely, 2^87736409651 is an apocalyptic number.

87736409651 is a deficient number, since it is larger than the sum of its proper divisors (7976037253).

87736409651 is a wasteful number, since it uses less digits than its factorization.

87736409651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7976037252.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 87736409651 in words is "eighty-seven billion, seven hundred thirty-six million, four hundred nine thousand, six hundred fifty-one".