16427699531 has 4 divisors (see below), whose sum is σ = 16446347064. Its totient is φ = 16409052000.

The previous prime is 16427699527. The next prime is 16427699543. The reversal of 16427699531 is 13599672461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16427699531 - 2² = 16427699527 is a prime.

It is a super-2 number, since 2×16427699531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16427699501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9322445 + ... + 9324206.

It is an arithmetic number, because the mean of its divisors is an integer number (4111586766).

Almost surely, 2^16427699531 is an apocalyptic number.

16427699531 is a deficient number, since it is larger than the sum of its proper divisors (18647533).

16427699531 is an equidigital number, since it uses as much as digits as its factorization.

16427699531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18647532.

The product of its digits is 2449440, while the sum is 53.

The spelling of 16427699531 in words is "sixteen billion, four hundred twenty-seven million, six hundred ninety-nine thousand, five hundred thirty-one".