4161421623 has 4 divisors (see below), whose sum is σ = 5548562168. Its totient is φ = 2774281080.

The previous prime is 4161421609. The next prime is 4161421639. The reversal of 4161421623 is 3261241614.

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

It is not a de Polignac number, because 4161421623 - 2⁶ = 4161421559 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 (4161421603) 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, 693570268 + ... + 693570273.

It is an arithmetic number, because the mean of its divisors is an integer number (1387140542).

Almost surely, 2^4161421623 is an apocalyptic number.

4161421623 is a deficient number, since it is larger than the sum of its proper divisors (1387140545).

4161421623 is a wasteful number, since it uses less digits than its factorization.

4161421623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387140544.

The product of its digits is 6912, while the sum is 30.

The square root of 4161421623 is about 64509.0817094772. The cubic root of 4161421623 is about 1608.4734862953.

Subtracting from 4161421623 its reverse (3261241614), we obtain a square (900180009 = 30003²).

The spelling of 4161421623 in words is "four billion, one hundred sixty-one million, four hundred twenty-one thousand, six hundred twenty-three".