647823350870384 has 320 divisors, whose sum is σ = 1471109310978048. Its totient is φ = 273612039782400.

The previous prime is 647823350870243. The next prime is 647823350870393. The reversal of 647823350870384 is 483078053328746.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (68).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 173539604582 + ... + 173539608314.

Almost surely, 2^{647823350870384} 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 647823350870384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (735554655489024).

647823350870384 is an abundant number, since it is smaller than the sum of its proper divisors (823285960107664).

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

647823350870384 is a wasteful number, since it uses less digits than its factorization.

647823350870384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7556 (or 7550 counting only the distinct ones).

The product of its (nonzero) digits is 650280960, while the sum is 68.

The spelling of 647823350870384 in words is "six hundred forty-seven trillion, eight hundred twenty-three billion, three hundred fifty million, eight hundred seventy thousand, three hundred eighty-four".