16236736997 has 4 divisors (see below), whose sum is σ = 17485716780. Its totient is φ = 14987757216.

The previous prime is 16236736993. The next prime is 16236737017. The reversal of 16236736997 is 79963763261.

It is a happy number.

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 9583235236 + 6653501761 = 97894^2 + 81569^2 .

It is a cyclic number.

It is not a de Polignac number, because 16236736997 - 2² = 16236736993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16236736991) 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, 624489872 + ... + 624489897.

It is an arithmetic number, because the mean of its divisors is an integer number (4371429195).

Almost surely, 2^16236736997 is an apocalyptic number.

It is an amenable number.

16236736997 is a deficient number, since it is larger than the sum of its proper divisors (1248979783).

16236736997 is a wasteful number, since it uses less digits than its factorization.

16236736997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248979782.

The product of its digits is 15431472, while the sum is 59.

The spelling of 16236736997 in words is "sixteen billion, two hundred thirty-six million, seven hundred thirty-six thousand, nine hundred ninety-seven".