105721749503 has 2 divisors, whose sum is σ = 105721749504. Its totient is φ = 105721749502.

The previous prime is 105721749487. The next prime is 105721749541. The reversal of 105721749503 is 305947127501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105721749503 - 2⁴ = 105721749487 is a prime.

It is a super-2 number, since 2×105721749503² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105721749703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52860874751 + 52860874752.

It is an arithmetic number, because the mean of its divisors is an integer number (52860874752).

Almost surely, 2^105721749503 is an apocalyptic number.

105721749503 is a deficient number, since it is larger than the sum of its proper divisors (1).

105721749503 is an equidigital number, since it uses as much as digits as its factorization.

105721749503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 264600, while the sum is 44.

The spelling of 105721749503 in words is "one hundred five billion, seven hundred twenty-one million, seven hundred forty-nine thousand, five hundred three".