251400042165 has 8 divisors (see below), whose sum is σ = 402240067488. Its totient is φ = 134080022480.

The previous prime is 251400042119. The next prime is 251400042233. The reversal of 251400042165 is 561240004152.

251400042165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 251400042165 - 2⁷ = 251400042037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8380001391 + ... + 8380001420.

It is an arithmetic number, because the mean of its divisors is an integer number (50280008436).

Almost surely, 2^251400042165 is an apocalyptic number.

It is an amenable number.

251400042165 is a deficient number, since it is larger than the sum of its proper divisors (150840025323).

251400042165 is a wasteful number, since it uses less digits than its factorization.

251400042165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16760002819.

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 251400042165 in words is "two hundred fifty-one billion, four hundred million, forty-two thousand, one hundred sixty-five".