10455566621 has 4 divisors (see below), whose sum is σ = 10472513052. Its totient is φ = 10438620192.

The previous prime is 10455566617. The next prime is 10455566623. The reversal of 10455566621 is 12666555401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12666555401 = 229 ⋅55312469.

It can be written as a sum of positive squares in 2 ways, for example, as 1795216900 + 8660349721 = 42370^2 + 93061^2 .

It is a cyclic number.

It is not a de Polignac number, because 10455566621 - 2² = 10455566617 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 (10455566623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8472290 + ... + 8473523.

It is an arithmetic number, because the mean of its divisors is an integer number (2618128263).

Almost surely, 2^10455566621 is an apocalyptic number.

It is an amenable number.

10455566621 is a deficient number, since it is larger than the sum of its proper divisors (16946431).

10455566621 is an equidigital number, since it uses as much as digits as its factorization.

10455566621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16946430.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 10455566621 in words is "ten billion, four hundred fifty-five million, five hundred sixty-six thousand, six hundred twenty-one".