106424739521 has 4 divisors (see below), whose sum is σ = 108169407444. Its totient is φ = 104680071600.

The previous prime is 106424739493. The next prime is 106424739559. The reversal of 106424739521 is 125937424601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125937424601 = 2531 ⋅49757971.

It can be written as a sum of positive squares in 2 ways, for example, as 13072492225 + 93352247296 = 114335^2 + 305536^2 .

It is a cyclic number.

It is not a de Polignac number, because 106424739521 - 2⁶ = 106424739457 is a prime.

It is a super-2 number, since 2×106424739521² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106424732521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 872333870 + ... + 872333991.

It is an arithmetic number, because the mean of its divisors is an integer number (27042351861).

Almost surely, 2^106424739521 is an apocalyptic number.

It is an amenable number.

106424739521 is a deficient number, since it is larger than the sum of its proper divisors (1744667923).

106424739521 is an equidigital number, since it uses as much as digits as its factorization.

106424739521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744667922.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 106424739521 in words is "one hundred six billion, four hundred twenty-four million, seven hundred thirty-nine thousand, five hundred twenty-one".