252502778002 has 4 divisors (see below), whose sum is σ = 378754167006. Its totient is φ = 126251389000.

The previous prime is 252502777991. The next prime is 252502778053. The reversal of 252502778002 is 200877205252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 163029405361 + 89473372641 = 403769^2 + 299121^2 .

It is a super-2 number, since 2×252502778002² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 63125694499 + ... + 63125694502.

Almost surely, 2^252502778002 is an apocalyptic number.

252502778002 is a deficient number, since it is larger than the sum of its proper divisors (126251389004).

252502778002 is a wasteful number, since it uses less digits than its factorization.

252502778002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126251389003.

The product of its (nonzero) digits is 156800, while the sum is 40.

The spelling of 252502778002 in words is "two hundred fifty-two billion, five hundred two million, seven hundred seventy-eight thousand, two".