64700140400 has 120 divisors (see below), whose sum is σ = 178007952000. Its totient is φ = 22137972480.

The previous prime is 64700140333. The next prime is 64700140471. The reversal of 64700140400 is 404100746.

64700140400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64700140400² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64700140400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1374047 + ... + 1420353.

It is an arithmetic number, because the mean of its divisors is an integer number (1483399600).

Almost surely, 2^64700140400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64700140400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89003976000).

64700140400 is an abundant number, since it is smaller than the sum of its proper divisors (113307811600).

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

64700140400 is a wasteful number, since it uses less digits than its factorization.

64700140400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46831 (or 46820 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The spelling of 64700140400 in words is "sixty-four billion, seven hundred million, one hundred forty thousand, four hundred".