10777990621 has 4 divisors (see below), whose sum is σ = 11149645500. Its totient is φ = 10406335744.

The previous prime is 10777990607. The next prime is 10777990651. The reversal of 10777990621 is 12609977701.

10777990621 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.

It can be written as a sum of positive squares in 2 ways, for example, as 6801300900 + 3976689721 = 82470^2 + 63061^2 .

It is a cyclic number.

It is not a de Polignac number, because 10777990621 - 2¹⁹ = 10777466333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10777990651) 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, 185827396 + ... + 185827453.

It is an arithmetic number, because the mean of its divisors is an integer number (2787411375).

Almost surely, 2^10777990621 is an apocalyptic number.

It is an amenable number.

10777990621 is a deficient number, since it is larger than the sum of its proper divisors (371654879).

10777990621 is an equidigital number, since it uses as much as digits as its factorization.

10777990621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371654878.

The product of its (nonzero) digits is 333396, while the sum is 49.

The spelling of 10777990621 in words is "ten billion, seven hundred seventy-seven million, nine hundred ninety thousand, six hundred twenty-one".