847951830649 has 27 divisors (see below), whose sum is σ = 1084307708421. Its totient is φ = 660686435640.

The previous prime is 847951830641. The next prime is 847951830673. The reversal of 847951830649 is 946038159748.

The square root of 847951830649 is 920843.

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

It is not a de Polignac number, because 847951830649 - 2³ = 847951830641 is a prime.

It is a super-2 number, since 2×847951830649² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (847951830641) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 70898932 + ... + 70910890.

Almost surely, 2^847951830649 is an apocalyptic number.

847951830649 is the 920843-rd square number.

847951830649 is the 460422-nd centered octagonal number.

It is an amenable number.

847951830649 is a deficient number, since it is larger than the sum of its proper divisors (236355877772).

847951830649 is an frugal number, since it uses more digits than its factorization.

847951830649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23954 (or 11977 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 64.

Multiplying 847951830649 by its sum of digits (64), we get a square (54268917161536 = 7366744²).

The spelling of 847951830649 in words is "eight hundred forty-seven billion, nine hundred fifty-one million, eight hundred thirty thousand, six hundred forty-nine".