88641637509 has 8 divisors (see below), whose sum is σ = 118210117792. Its totient is φ = 59083791120.

The previous prime is 88641637477. The next prime is 88641637537. The reversal of 88641637509 is 90573614688.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 88641637509 - 2⁵ = 88641637477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88641637549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2639002 + ... + 2672379.

It is an arithmetic number, because the mean of its divisors is an integer number (14776264724).

Almost surely, 2^88641637509 is an apocalyptic number.

It is an amenable number.

88641637509 is a deficient number, since it is larger than the sum of its proper divisors (29568480283).

88641637509 is a wasteful number, since it uses less digits than its factorization.

88641637509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5316947.

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 88641637509 in words is "eighty-eight billion, six hundred forty-one million, six hundred thirty-seven thousand, five hundred nine".