16506145631 has 8 divisors (see below), whose sum is σ = 17479118304. Its totient is φ = 15533397760.

The previous prime is 16506145627. The next prime is 16506145637. The reversal of 16506145631 is 13654160561.

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

It is not a de Polignac number, because 16506145631 - 2² = 16506145627 is a prime.

It is a super-2 number, since 2×16506145631² (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 (16506145637) 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, 108851 + ... + 211803.

It is an arithmetic number, because the mean of its divisors is an integer number (2184889788).

Almost surely, 2^16506145631 is an apocalyptic number.

16506145631 is a deficient number, since it is larger than the sum of its proper divisors (972972673).

16506145631 is a wasteful number, since it uses less digits than its factorization.

16506145631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112401.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 16506145631 in words is "sixteen billion, five hundred six million, one hundred forty-five thousand, six hundred thirty-one".