647878165350 has 192 divisors, whose sum is σ = 1748805569280. Its totient is φ = 157782643200.

The previous prime is 647878165349. The next prime is 647878165351. The reversal of 647878165350 is 53561878746.

It is an interprime number because it is at equal distance from previous prime (647878165349) and next prime (647878165351).

It is a super-2 number, since 2×647878165350² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647878165351) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 88637496 + ... + 88644804.

It is an arithmetic number, because the mean of its divisors is an integer number (9108362340).

Almost surely, 2^647878165350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647878165350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (874402784640).

647878165350 is an abundant number, since it is smaller than the sum of its proper divisors (1100927403930).

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

647878165350 is a wasteful number, since it uses less digits than its factorization.

647878165350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7815 (or 7810 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 60.

The spelling of 647878165350 in words is "six hundred forty-seven billion, eight hundred seventy-eight million, one hundred sixty-five thousand, three hundred fifty".