64745231040 has 784 divisors, whose sum is σ = 272913530880. Its totient is φ = 14310328320.

The previous prime is 64745231039. The next prime is 64745231069. The reversal of 64745231040 is 4013254746.

64745231040 is a `hidden beast` number, since 64 + 74 + 523 + 1 + 0 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 64745230986 and 64745231004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 50621121 + ... + 50622399.

Almost surely, 2^64745231040 is an apocalyptic number.

64745231040 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 64745231040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136456765440).

64745231040 is an abundant number, since it is smaller than the sum of its proper divisors (208168299840).

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

64745231040 is a wasteful number, since it uses less digits than its factorization.

64745231040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352 (or 1327 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

Adding to 64745231040 its reverse (4013254746), we get a palindrome (68758485786).

The spelling of 64745231040 in words is "sixty-four billion, seven hundred forty-five million, two hundred thirty-one thousand, forty".