64507895040 has 144 divisors (see below), whose sum is σ = 212668356096. Its totient is φ = 16647168000.

The previous prime is 64507895021. The next prime is 64507895069. The reversal of 64507895040 is 4059870546.

It is a super-4 number, since 4×64507895040⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (48) 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 (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151911 + ... + 389990.

It is an arithmetic number, because the mean of its divisors is an integer number (1476863584).

Almost surely, 2^64507895040 is an apocalyptic number.

64507895040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64507895040 is an abundant number, since it is smaller than the sum of its proper divisors (148160461056).

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

64507895040 is a wasteful number, since it uses less digits than its factorization.

64507895040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541956 (or 541942 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 64507895040 in words is "sixty-four billion, five hundred seven million, eight hundred ninety-five thousand, forty".