856724545 has 16 divisors (see below), whose sum is σ = 1051600320. Its totient is φ = 669828544.

The previous prime is 856724543. The next prime is 856724549. The reversal of 856724545 is 545427658.

It is a cyclic number.

It is not a de Polignac number, because 856724545 - 2¹ = 856724543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 856724495 and 856724504.

It is not an unprimeable number, because it can be changed into a prime (856724543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42642 + ... + 59428.

It is an arithmetic number, because the mean of its divisors is an integer number (65725020).

Almost surely, 2^856724545 is an apocalyptic number.

It is an amenable number.

856724545 is a deficient number, since it is larger than the sum of its proper divisors (194875775).

856724545 is a wasteful number, since it uses less digits than its factorization.

856724545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17024.

The product of its digits is 1344000, while the sum is 46.

The square root of 856724545 is about 29269.8572767275. The cubic root of 856724545 is about 949.7596972999.

The spelling of 856724545 in words is "eight hundred fifty-six million, seven hundred twenty-four thousand, five hundred forty-five".