849564071524 has 27 divisors (see below), whose sum is σ = 1729495986393. Its totient is φ = 364093357488.

The previous prime is 849564071513. The next prime is 849564071539. The reversal of 849564071524 is 425170465948.

The square root of 849564071524 is 921718.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 105540516900 + 744023554624 = 324870^2 + 862568^2 .

It is a super-2 number, since 2×849564071524² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12871134 + ... + 12936970.

Almost surely, 2^849564071524 is an apocalyptic number.

849564071524 is the 921718-th square number.

It is an amenable number.

849564071524 is an abundant number, since it is smaller than the sum of its proper divisors (879931914869).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

849564071524 is an frugal number, since it uses more digits than its factorization.

849564071524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131692 (or 65846 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 55.

The spelling of 849564071524 in words is "eight hundred forty-nine billion, five hundred sixty-four million, seventy-one thousand, five hundred twenty-four".