10355251661 has 4 divisors (see below), whose sum is σ = 10358814300. Its totient is φ = 10351689024.

The previous prime is 10355251657. The next prime is 10355251703. The reversal of 10355251661 is 16615255301.

10355251661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16615255301 = 73 ⋅227606237.

It can be written as a sum of positive squares in 2 ways, for example, as 3908125225 + 6447126436 = 62515^2 + 80294^2 .

It is a cyclic number.

It is not a de Polignac number, because 10355251661 - 2² = 10355251657 is a prime.

It is a super-3 number, since 3×10355251661³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10355254661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1776956 + ... + 1782773.

It is an arithmetic number, because the mean of its divisors is an integer number (2589703575).

Almost surely, 2^10355251661 is an apocalyptic number.

It is an amenable number.

10355251661 is a deficient number, since it is larger than the sum of its proper divisors (3562639).

10355251661 is an equidigital number, since it uses as much as digits as its factorization.

10355251661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562638.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 10355251661 in words is "ten billion, three hundred fifty-five million, two hundred fifty-one thousand, six hundred sixty-one".