10445727997 has 4 divisors (see below), whose sum is σ = 10471777596. Its totient is φ = 10419678400.

The previous prime is 10445727961. The next prime is 10445728009. The reversal of 10445727997 is 79972754401.

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 8998229881 + 1447498116 = 94859^2 + 38046^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10445727997 is a prime.

It is a super-2 number, since 2×10445727997² (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 (10445727917) 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, 13024198 + ... + 13024999.

It is an arithmetic number, because the mean of its divisors is an integer number (2617944399).

Almost surely, 2^10445727997 is an apocalyptic number.

It is an amenable number.

10445727997 is a deficient number, since it is larger than the sum of its proper divisors (26049599).

10445727997 is an equidigital number, since it uses as much as digits as its factorization.

10445727997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26049598.

The product of its (nonzero) digits is 4445280, while the sum is 55.

The spelling of 10445727997 in words is "ten billion, four hundred forty-five million, seven hundred twenty-seven thousand, nine hundred ninety-seven".