106440993565 has 4 divisors (see below), whose sum is σ = 127729192284. Its totient is φ = 85152794848.

The previous prime is 106440993559. The next prime is 106440993629. The reversal of 106440993565 is 565399044601.

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 61195874884 + 45245118681 = 247378^2 + 212709^2 .

It is a cyclic number.

It is not a de Polignac number, because 106440993565 - 2³ = 106440993557 is a prime.

It is a super-2 number, since 2×106440993565² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10644099352 + ... + 10644099361.

It is an arithmetic number, because the mean of its divisors is an integer number (31932298071).

Almost surely, 2^106440993565 is an apocalyptic number.

It is an amenable number.

106440993565 is a deficient number, since it is larger than the sum of its proper divisors (21288198719).

106440993565 is an equidigital number, since it uses as much as digits as its factorization.

106440993565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21288198718.

The product of its (nonzero) digits is 3499200, while the sum is 52.

The spelling of 106440993565 in words is "one hundred six billion, four hundred forty million, nine hundred ninety-three thousand, five hundred sixty-five".