10126581521 has 12 divisors (see below), whose sum is σ = 11852179632. Its totient is φ = 8626669128.

The previous prime is 10126581511. The next prime is 10126581527. The reversal of 10126581521 is 12518562101.

It is a de Polignac number, because none of the positive numbers 2^k-10126581521 is a prime.

It is a super-3 number, since 3×10126581521³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10126581527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 625955 + ... + 641928.

It is an arithmetic number, because the mean of its divisors is an integer number (987681636).

Almost surely, 2^10126581521 is an apocalyptic number.

It is an amenable number.

10126581521 is a deficient number, since it is larger than the sum of its proper divisors (1725598111).

10126581521 is a wasteful number, since it uses less digits than its factorization.

10126581521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268060 (or 1268053 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 32.

The spelling of 10126581521 in words is "ten billion, one hundred twenty-six million, five hundred eighty-one thousand, five hundred twenty-one".