42616661623 has 8 divisors (see below), whose sum is σ = 43012151600. Its totient is φ = 42221253888.

The previous prime is 42616661603. The next prime is 42616661639. The reversal of 42616661623 is 32616661624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42616661623 - 2²⁵ = 42583107191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42616661623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42616661603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1629988 + ... + 1655926.

It is an arithmetic number, because the mean of its divisors is an integer number (5376518950).

Almost surely, 2^42616661623 is an apocalyptic number.

42616661623 is a deficient number, since it is larger than the sum of its proper divisors (395489977).

42616661623 is a wasteful number, since it uses less digits than its factorization.

42616661623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41121.

The product of its digits is 373248, while the sum is 43.

Subtracting from 42616661623 its reverse (32616661624), we obtain a palindrome (9999999999).

The spelling of 42616661623 in words is "forty-two billion, six hundred sixteen million, six hundred sixty-one thousand, six hundred twenty-three".