64735489440 has 192 divisors, whose sum is σ = 228819064320. Its totient is φ = 17091763200.

The previous prime is 64735489417. The next prime is 64735489493. The reversal of 64735489440 is 4498453746.

64735489440 is a `hidden beast` number, since 6 + 4 + 7 + 3 + 548 + 94 + 4 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 362137 + ... + 510503.

It is an arithmetic number, because the mean of its divisors is an integer number (1191765960).

Almost surely, 2^64735489440 is an apocalyptic number.

64735489440 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 64735489440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114409532160).

64735489440 is an abundant number, since it is smaller than the sum of its proper divisors (164083574880).

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

64735489440 is a wasteful number, since it uses less digits than its factorization.

64735489440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148492 (or 148478 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 64735489440 in words is "sixty-four billion, seven hundred thirty-five million, four hundred eighty-nine thousand, four hundred forty".