16234909997 has 4 divisors (see below), whose sum is σ = 16235192700. Its totient is φ = 16234627296.

The previous prime is 16234909981. The next prime is 16234910033. The reversal of 16234909997 is 79990943261.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16203762436 + 31147561 = 127294^2 + 5581^2 .

It is a cyclic number.

It is not a de Polignac number, because 16234909997 - 2⁴ = 16234909981 is a prime.

It is a super-2 number, since 2×16234909997² (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 (16234909297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21122 + ... + 181427.

It is an arithmetic number, because the mean of its divisors is an integer number (4058798175).

Almost surely, 2^16234909997 is an apocalyptic number.

It is an amenable number.

16234909997 is a deficient number, since it is larger than the sum of its proper divisors (282703).

16234909997 is an equidigital number, since it uses as much as digits as its factorization.

16234909997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282702.

The product of its (nonzero) digits is 6613488, while the sum is 59.

The spelling of 16234909997 in words is "sixteen billion, two hundred thirty-four million, nine hundred nine thousand, nine hundred ninety-seven".