10007556521 has 2 divisors, whose sum is σ = 10007556522. Its totient is φ = 10007556520.

The previous prime is 10007556487. The next prime is 10007556527. The reversal of 10007556521 is 12565570001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7857936025 + 2149620496 = 88645^2 + 46364^2 .

It is an emirp because it is prime and its reverse (12565570001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10007556521 - 2⁶ = 10007556457 is a prime.

It is not a weakly prime, because it can be changed into another prime (10007556527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5003778260 + 5003778261.

It is an arithmetic number, because the mean of its divisors is an integer number (5003778261).

Almost surely, 2^10007556521 is an apocalyptic number.

It is an amenable number.

10007556521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10007556521 is an equidigital number, since it uses as much as digits as its factorization.

10007556521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10500, while the sum is 32.

The spelling of 10007556521 in words is "ten billion, seven million, five hundred fifty-six thousand, five hundred twenty-one".