16451957783 has 4 divisors (see below), whose sum is σ = 16853225088. Its totient is φ = 16050690480.

The previous prime is 16451957779. The next prime is 16451957807. The reversal of 16451957783 is 38775915461.

It is a happy number.

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 16451957783 - 2² = 16451957779 is a prime.

It is a super-2 number, since 2×16451957783² (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 (16451957713) 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, 200633591 + ... + 200633672.

It is an arithmetic number, because the mean of its divisors is an integer number (4213306272).

Almost surely, 2^16451957783 is an apocalyptic number.

16451957783 is a deficient number, since it is larger than the sum of its proper divisors (401267305).

16451957783 is an equidigital number, since it uses as much as digits as its factorization.

16451957783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401267304.

The product of its digits is 6350400, while the sum is 56.

The spelling of 16451957783 in words is "sixteen billion, four hundred fifty-one million, nine hundred fifty-seven thousand, seven hundred eighty-three".