857044647465 has 16 divisors (see below), whose sum is σ = 1371524895168. Its totient is φ = 457005992256.

The previous prime is 857044647463. The next prime is 857044647587. The reversal of 857044647465 is 564746440758.

It is not a de Polignac number, because 857044647465 - 2¹ = 857044647463 is a prime.

It is a super-2 number, since 2×857044647465² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 857044647399 and 857044647408.

It is not an unprimeable number, because it can be changed into a prime (857044647463) 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, 5196499 + ... + 5358888.

It is an arithmetic number, because the mean of its divisors is an integer number (85720305948).

Almost surely, 2^857044647465 is an apocalyptic number.

It is an amenable number.

857044647465 is a deficient number, since it is larger than the sum of its proper divisors (514480247703).

857044647465 is a wasteful number, since it uses less digits than its factorization.

857044647465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10560808.

The product of its (nonzero) digits is 90316800, while the sum is 60.

The spelling of 857044647465 in words is "eight hundred fifty-seven billion, forty-four million, six hundred forty-seven thousand, four hundred sixty-five".