851615648 has 48 divisors (see below), whose sum is σ = 1808142336. Its totient is φ = 392497920.

The previous prime is 851615621. The next prime is 851615707. The reversal of 851615648 is 846516158.

It is a super-3 number, since 3×851615648³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 851615599 and 851615608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511265 + ... + 512927.

It is an arithmetic number, because the mean of its divisors is an integer number (37669632).

Almost surely, 2^851615648 is an apocalyptic number.

It is an amenable number.

851615648 is an abundant number, since it is smaller than the sum of its proper divisors (956526688).

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

851615648 is a wasteful number, since it uses less digits than its factorization.

851615648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917 (or 2909 counting only the distinct ones).

The product of its digits is 230400, while the sum is 44.

The square root of 851615648 is about 29182.4544546890. The cubic root of 851615648 is about 947.8680345900.

It can be divided in two parts, 85161 and 5648, that added together give a palindrome (90809).

The spelling of 851615648 in words is "eight hundred fifty-one million, six hundred fifteen thousand, six hundred forty-eight".