252378631209 has 16 divisors (see below), whose sum is σ = 348398449920. Its totient is φ = 162315283200.

The previous prime is 252378631189. The next prime is 252378631231. The reversal of 252378631209 is 902136873252.

It is not a de Polignac number, because 252378631209 - 2²¹ = 252376534057 is a prime.

It is a super-5 number, since 5×252378631209⁵ (a number of 58 digits) contains 55555 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (252378631009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1103217 + ... + 1312190.

It is an arithmetic number, because the mean of its divisors is an integer number (21774903120).

Almost surely, 2^252378631209 is an apocalyptic number.

252378631209 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

252378631209 is a deficient number, since it is larger than the sum of its proper divisors (96019818711).

252378631209 is a wasteful number, since it uses less digits than its factorization.

252378631209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416640.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 252378631209 in words is "two hundred fifty-two billion, three hundred seventy-eight million, six hundred thirty-one thousand, two hundred nine".