10540436721 has 8 divisors (see below), whose sum is σ = 14075440320. Its totient is φ = 7016195472.

The previous prime is 10540436707. The next prime is 10540436723. The reversal of 10540436721 is 12763404501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10540436721 - 2²⁶ = 10473327857 is a prime.

It is a super-2 number, since 2×10540436721² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10540436723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2688301 + ... + 2692218.

It is an arithmetic number, because the mean of its divisors is an integer number (1759430040).

Almost surely, 2^10540436721 is an apocalyptic number.

It is an amenable number.

10540436721 is a deficient number, since it is larger than the sum of its proper divisors (3535003599).

10540436721 is an equidigital number, since it uses as much as digits as its factorization.

10540436721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5381175.

The product of its (nonzero) digits is 20160, while the sum is 33.

The spelling of 10540436721 in words is "ten billion, five hundred forty million, four hundred thirty-six thousand, seven hundred twenty-one".