64294663680 has 1600 divisors, whose sum is σ = 278493925248. Its totient is φ = 14014218240.

The previous prime is 64294663651. The next prime is 64294663723. The reversal of 64294663680 is 8636649246.

It is a super-2 number, since 2×64294663680² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1054010850 + ... + 1054010910.

Almost surely, 2^64294663680 is an apocalyptic number.

64294663680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64294663680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139246962624).

64294663680 is an abundant number, since it is smaller than the sum of its proper divisors (214199261568).

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

64294663680 is a wasteful number, since it uses less digits than its factorization.

64294663680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 54.

The spelling of 64294663680 in words is "sixty-four billion, two hundred ninety-four million, six hundred sixty-three thousand, six hundred eighty".