490636878155 has 8 divisors (see below), whose sum is σ = 589502984112. Its totient is φ = 392017015648.

The previous prime is 490636878119. The next prime is 490636878181. The reversal of 490636878155 is 551878636094.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 490636878155 - 2¹² = 490636874059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61556477 + ... + 61564446.

It is an arithmetic number, because the mean of its divisors is an integer number (73687873014).

Almost surely, 2^490636878155 is an apocalyptic number.

490636878155 is a deficient number, since it is larger than the sum of its proper divisors (98866105957).

490636878155 is a wasteful number, since it uses less digits than its factorization.

490636878155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123121725.

The product of its (nonzero) digits is 43545600, while the sum is 62.

The spelling of 490636878155 in words is "four hundred ninety billion, six hundred thirty-six million, eight hundred seventy-eight thousand, one hundred fifty-five".