16648257631 has 8 divisors (see below), whose sum is σ = 16703988624. Its totient is φ = 16592609280.

The previous prime is 16648257629. The next prime is 16648257649. The reversal of 16648257631 is 13675284661.

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

It is a cyclic number.

It is not a de Polignac number, because 16648257631 - 2¹ = 16648257629 is a prime.

It is a super-2 number, since 2×16648257631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16648257931) 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, 396895 + ... + 436831.

It is an arithmetic number, because the mean of its divisors is an integer number (2087998578).

Almost surely, 2^16648257631 is an apocalyptic number.

16648257631 is a deficient number, since it is larger than the sum of its proper divisors (55730993).

16648257631 is an equidigital number, since it uses as much as digits as its factorization.

16648257631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41321.

The product of its digits is 1451520, while the sum is 49.

The spelling of 16648257631 in words is "sixteen billion, six hundred forty-eight million, two hundred fifty-seven thousand, six hundred thirty-one".