4161394251 has 32 divisors (see below), whose sum is σ = 7053772800. Its totient is φ = 2375231040.

The previous prime is 4161394247. The next prime is 4161394253. The reversal of 4161394251 is 1524931614.

It is a happy number.

4161394251 is a `hidden beast` number, since 4 + 16 + 1 + 394 + 251 = 666.

4161394251 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4161394251 - 2² = 4161394247 is a prime.

It is a super-2 number, since 2×4161394251² = 34634404224511702002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4161394253) 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, 160095 + ... + 184263.

It is an arithmetic number, because the mean of its divisors is an integer number (220430400).

Almost surely, 2^4161394251 is an apocalyptic number.

4161394251 is a deficient number, since it is larger than the sum of its proper divisors (2892378549).

4161394251 is a wasteful number, since it uses less digits than its factorization.

4161394251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25096 (or 25090 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 4161394251 is about 64508.8695529537. The cubic root of 4161394251 is about 1608.4699596773.

The spelling of 4161394251 in words is "four billion, one hundred sixty-one million, three hundred ninety-four thousand, two hundred fifty-one".