10001531665 has 8 divisors (see below), whose sum is σ = 12002410368. Its totient is φ = 8000843760.

The previous prime is 10001531633. The next prime is 10001531671. The reversal of 10001531665 is 56613510001.

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

It is not a de Polignac number, because 10001531665 - 2⁵ = 10001531633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123480 + ... + 187750.

It is an arithmetic number, because the mean of its divisors is an integer number (1500301296).

Almost surely, 2^10001531665 is an apocalyptic number.

It is an amenable number.

10001531665 is a deficient number, since it is larger than the sum of its proper divisors (2000878703).

10001531665 is an equidigital number, since it uses as much as digits as its factorization.

10001531665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95399.

The product of its (nonzero) digits is 2700, while the sum is 28.

The spelling of 10001531665 in words is "ten billion, one million, five hundred thirty-one thousand, six hundred sixty-five".