64140730140 has 48 divisors (see below), whose sum is σ = 179646935328. Its totient is φ = 17099157504.

The previous prime is 64140730111. The next prime is 64140730201. The reversal of 64140730140 is 4103704146.

It is a super-2 number, since 2×64140730140² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 64140730098 and 64140730107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50284 + ... + 361676.

It is an arithmetic number, because the mean of its divisors is an integer number (3742644486).

Almost surely, 2^64140730140 is an apocalyptic number.

64140730140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64140730140 is an abundant number, since it is smaller than the sum of its proper divisors (115506205188).

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

64140730140 is a wasteful number, since it uses less digits than its factorization.

64140730140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314838 (or 314836 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The spelling of 64140730140 in words is "sixty-four billion, one hundred forty million, seven hundred thirty thousand, one hundred forty".