64715671440 has 160 divisors (see below), whose sum is σ = 254753813760. Its totient is φ = 14792150016.

The previous prime is 64715671403. The next prime is 64715671463. The reversal of 64715671440 is 4417651746.

64715671440 is a `hidden beast` number, since 6 + 4 + 71 + 567 + 14 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 31 ways as a sum of consecutive naturals, for example, 2124949 + ... + 2155188.

It is an arithmetic number, because the mean of its divisors is an integer number (1592211336).

Almost surely, 2^64715671440 is an apocalyptic number.

64715671440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64715671440 is an abundant number, since it is smaller than the sum of its proper divisors (190038142320).

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

64715671440 is a wasteful number, since it uses less digits than its factorization.

64715671440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4280166 (or 4280154 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 64715671440 in words is "sixty-four billion, seven hundred fifteen million, six hundred seventy-one thousand, four hundred forty".