10181626649 has 2 divisors, whose sum is σ = 10181626650. Its totient is φ = 10181626648.

The previous prime is 10181626627. The next prime is 10181626669. The reversal of 10181626649 is 94662618101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7067428624 + 3114198025 = 84068^2 + 55805^2 .

It is a cyclic number.

It is not a de Polignac number, because 10181626649 - 2⁸ = 10181626393 is a prime.

It is not a weakly prime, because it can be changed into another prime (10181626669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5090813324 + 5090813325.

It is an arithmetic number, because the mean of its divisors is an integer number (5090813325).

Almost surely, 2^10181626649 is an apocalyptic number.

It is an amenable number.

10181626649 is a deficient number, since it is larger than the sum of its proper divisors (1).

10181626649 is an equidigital number, since it uses as much as digits as its factorization.

10181626649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 10181626649 in words is "ten billion, one hundred eighty-one million, six hundred twenty-six thousand, six hundred forty-nine".