252278671842 has 18 divisors (see below), whose sum is σ = 546608406123. Its totient is φ = 84092180292.

The previous prime is 252278671829. The next prime is 252278671847. The reversal of 252278671842 is 248176872252.

It is a happy number.

252278671842 is a `hidden beast` number, since 2 + 522 + 7 + 8 + 6 + 71 + 8 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 126139335921 + 126139335921 = 355161^2 + 355161^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=355161.

It is not an unprimeable number, because it can be changed into a prime (252278671847) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2071773 + ... + 2190159.

Almost surely, 2^252278671842 is an apocalyptic number.

252278671842 is an abundant number, since it is smaller than the sum of its proper divisors (294329734281).

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

252278671842 is an frugal number, since it uses more digits than its factorization.

252278671842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236782 (or 118392 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 54.

It can be divided in two parts, 252278 and 671842, that added together give a triangular number (924120 = T₁₃₅₉).

The spelling of 252278671842 in words is "two hundred fifty-two billion, two hundred seventy-eight million, six hundred seventy-one thousand, eight hundred forty-two".