87721439802337 has 16 divisors (see below), whose sum is σ = 95872541466240. Its totient is φ = 79599784595200.

The previous prime is 87721439802329. The next prime is 87721439802343. The reversal of 87721439802337 is 73320893412778.

It is a cyclic number.

It is not a de Polignac number, because 87721439802337 - 2³ = 87721439802329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87721439802397) 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 15 ways as a sum of consecutive naturals, for example, 40623012 + ... + 42727882.

It is an arithmetic number, because the mean of its divisors is an integer number (5992033841640).

Almost surely, 2^{87721439802337} is an apocalyptic number.

It is an amenable number.

87721439802337 is a deficient number, since it is larger than the sum of its proper divisors (8151101663903).

87721439802337 is a wasteful number, since it uses less digits than its factorization.

87721439802337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111864.

The product of its (nonzero) digits is 85349376, while the sum is 64.

The spelling of 87721439802337 in words is "eighty-seven trillion, seven hundred twenty-one billion, four hundred thirty-nine million, eight hundred two thousand, three hundred thirty-seven".