815856153 has 8 divisors (see below), whose sum is σ = 1243209408. Its totient is φ = 466203504.

The previous prime is 815856149. The next prime is 815856193. The reversal of 815856153 is 351658518.

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

It is not a de Polignac number, because 815856153 - 2² = 815856149 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (815856193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19425126 + ... + 19425167.

It is an arithmetic number, because the mean of its divisors is an integer number (155401176).

Almost surely, 2^815856153 is an apocalyptic number.

It is an amenable number.

815856153 is a deficient number, since it is larger than the sum of its proper divisors (427353255).

815856153 is a wasteful number, since it uses less digits than its factorization.

815856153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38850303.

The product of its digits is 144000, while the sum is 42.

The square root of 815856153 is about 28563.1957770835. The cubic root of 815856153 is about 934.4108322750.

The spelling of 815856153 in words is "eight hundred fifteen million, eight hundred fifty-six thousand, one hundred fifty-three".