105651565997 has 4 divisors (see below), whose sum is σ = 105657022140. Its totient is φ = 105646109856.

The previous prime is 105651565993. The next prime is 105651566029. The reversal of 105651565997 is 799565156501.

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 6938723401 + 98712842596 = 83299^2 + 314186^2 .

It is a cyclic number.

It is not a de Polignac number, because 105651565997 - 2² = 105651565993 is a prime.

It is a super-2 number, since 2×105651565997² (a number of 23 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 (105651565993) 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, 2698922 + ... + 2737787.

It is an arithmetic number, because the mean of its divisors is an integer number (26414255535).

Almost surely, 2^105651565997 is an apocalyptic number.

It is an amenable number.

105651565997 is a deficient number, since it is larger than the sum of its proper divisors (5456143).

105651565997 is an equidigital number, since it uses as much as digits as its factorization.

105651565997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5456142.

The product of its (nonzero) digits is 12757500, while the sum is 59.

The spelling of 105651565997 in words is "one hundred five billion, six hundred fifty-one million, five hundred sixty-five thousand, nine hundred ninety-seven".