10434915721 has 4 divisors (see below), whose sum is σ = 10435123732. Its totient is φ = 10434707712.

The previous prime is 10434915719. The next prime is 10434915727. The reversal of 10434915721 is 12751943401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12751943401 = 107243 ⋅118907.

It can be written as a sum of positive squares in 2 ways, for example, as 4207338496 + 6227577225 = 64864^2 + 78915^2 .

It is a cyclic number.

It is not a de Polignac number, because 10434915721 - 2¹ = 10434915719 is a prime.

It is a super-2 number, since 2×10434915721² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10434915727) 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, 22681 + ... + 146233.

It is an arithmetic number, because the mean of its divisors is an integer number (2608780933).

Almost surely, 2^10434915721 is an apocalyptic number.

It is an amenable number.

10434915721 is a deficient number, since it is larger than the sum of its proper divisors (208011).

10434915721 is an equidigital number, since it uses as much as digits as its factorization.

10434915721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208010.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 10434915721 in words is "ten billion, four hundred thirty-four million, nine hundred fifteen thousand, seven hundred twenty-one".