5661938623 has 4 divisors (see below), whose sum is σ = 6176660328. Its totient is φ = 5147216920.

The previous prime is 5661938609. The next prime is 5661938629. The reversal of 5661938623 is 3268391665.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5661938623 - 2¹³ = 5661930431 is a prime.

It is a super-2 number, since 2×5661938623² = 64115097941238272258, which contains 22 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 (5661938629) 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, 257360836 + ... + 257360857.

It is an arithmetic number, because the mean of its divisors is an integer number (1544165082).

Almost surely, 2^5661938623 is an apocalyptic number.

5661938623 is a deficient number, since it is larger than the sum of its proper divisors (514721705).

5661938623 is a wasteful number, since it uses less digits than its factorization.

5661938623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514721704.

The product of its digits is 1399680, while the sum is 49.

The square root of 5661938623 is about 75245.8545236879. The cubic root of 5661938623 is about 1782.3311021938.

The spelling of 5661938623 in words is "five billion, six hundred sixty-one million, nine hundred thirty-eight thousand, six hundred twenty-three".