64470944593440 has 768 divisors, whose sum is σ = 285939778682880. Its totient is φ = 13176940032000.

The previous prime is 64470944593309. The next prime is 64470944593459. The reversal of 64470944593440 is 4439544907446.

64470944593440 is a `hidden beast` number, since 6 + 4 + 470 + 9 + 44 + 59 + 34 + 40 = 666.

It is a Smith number, since the sum of its digits (63) 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 (63).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 18702385 + ... + 21879695.

It is an arithmetic number, because the mean of its divisors is an integer number (372317420160).

Almost surely, 2^{64470944593440} is an apocalyptic number.

64470944593440 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 64470944593440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142969889341440).

64470944593440 is an abundant number, since it is smaller than the sum of its proper divisors (221468834089440).

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

64470944593440 is a wasteful number, since it uses less digits than its factorization.

64470944593440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3177414 (or 3177400 counting only the distinct ones).

The product of its (nonzero) digits is 209018880, while the sum is 63.

The spelling of 64470944593440 in words is "sixty-four trillion, four hundred seventy billion, nine hundred forty-four million, five hundred ninety-three thousand, four hundred forty".