623254543616661 has 32 divisors (see below), whose sum is σ = 946003080471552. Its totient is φ = 361293342600960.

The previous prime is 623254543616609. The next prime is 623254543616681. The reversal of 623254543616661 is 166616345452326.

It is not a de Polignac number, because 623254543616661 - 2²⁵ = 623254510062229 is a prime.

It is a super-2 number, since 2×623254543616661² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 623254543616595 and 623254543616604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623254543616681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4637526 + ... + 35609208.

It is an arithmetic number, because the mean of its divisors is an integer number (29562596264736).

Almost surely, 2^{623254543616661} is an apocalyptic number.

It is an amenable number.

623254543616661 is a deficient number, since it is larger than the sum of its proper divisors (322748536854891).

623254543616661 is a wasteful number, since it uses less digits than its factorization.

623254543616661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30998233.

The product of its digits is 111974400, while the sum is 60.

The spelling of 623254543616661 in words is "six hundred twenty-three trillion, two hundred fifty-four billion, five hundred forty-three million, six hundred sixteen thousand, six hundred sixty-one".