502206878378 has 4 divisors (see below), whose sum is σ = 753310317570. Its totient is φ = 251103439188.

The previous prime is 502206878237. The next prime is 502206878413. The reversal of 502206878378 is 873878602205.

It is a happy number.

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., 490079803249 + 12127075129 = 700057^2 + 110123^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125551719593 + ... + 125551719596.

Almost surely, 2^502206878378 is an apocalyptic number.

502206878378 is a deficient number, since it is larger than the sum of its proper divisors (251103439192).

502206878378 is a wasteful number, since it uses less digits than its factorization.

502206878378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251103439191.

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 502206878378 in words is "five hundred two billion, two hundred six million, eight hundred seventy-eight thousand, three hundred seventy-eight".