249999972166668 has 96 divisors (see below), whose sum is σ = 601038932175360. Its totient is φ = 80827640988160.

The previous prime is 249999972166663. The next prime is 249999972166723. The reversal of 249999972166668 is 866661279999942.

It is not an unprimeable number, because it can be changed into a prime (249999972166661) 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, 3114098953 + ... + 3114179231.

It is an arithmetic number, because the mean of its divisors is an integer number (6260822210160).

Almost surely, 2^{249999972166668} is an apocalyptic number.

It is an amenable number.

249999972166668 is an abundant number, since it is smaller than the sum of its proper divisors (351038960008692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

249999972166668 is a wasteful number, since it uses less digits than its factorization.

249999972166668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117087 (or 117085 counting only the distinct ones).

The product of its digits is 68568643584, while the sum is 93.

The spelling of 249999972166668 in words is "two hundred forty-nine trillion, nine hundred ninety-nine billion, nine hundred seventy-two million, one hundred sixty-six thousand, six hundred sixty-eight".