856715009045 has 32 divisors (see below), whose sum is σ = 1195153552896. Its totient is φ = 577362297600.

The previous prime is 856715008979. The next prime is 856715009069. The reversal of 856715009045 is 540900517658.

It is not a de Polignac number, because 856715009045 - 2¹⁰ = 856715008021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 856715008984 and 856715009002.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 2478800 + ... + 2803190.

It is an arithmetic number, because the mean of its divisors is an integer number (37348548528).

Almost surely, 2^856715009045 is an apocalyptic number.

It is an amenable number.

856715009045 is a deficient number, since it is larger than the sum of its proper divisors (338438543851).

856715009045 is a wasteful number, since it uses less digits than its factorization.

856715009045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325701.

The product of its (nonzero) digits is 1512000, while the sum is 50.

The spelling of 856715009045 in words is "eight hundred fifty-six billion, seven hundred fifteen million, nine thousand, forty-five".