647168148 has 72 divisors (see below), whose sum is σ = 1791840960. Its totient is φ = 195317760.

The previous prime is 647168143. The next prime is 647168173. The reversal of 647168148 is 841861746.

It is a super-2 number, since 2×647168148² = 837653223571499808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647168143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98593 + ... + 104951.

It is an arithmetic number, because the mean of its divisors is an integer number (24886680).

Almost surely, 2^647168148 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647168148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (895920480).

647168148 is an abundant number, since it is smaller than the sum of its proper divisors (1144672812).

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

647168148 is a wasteful number, since it uses less digits than its factorization.

647168148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6637 (or 6632 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 647168148 is about 25439.4997592327. The cubic root of 647168148 is about 864.9792940570.

The spelling of 647168148 in words is "six hundred forty-seven million, one hundred sixty-eight thousand, one hundred forty-eight".