64603412500 has 180 divisors, whose sum is σ = 155881390140. Its totient is φ = 23425600000.

The previous prime is 64603412473. The next prime is 64603412513. The reversal of 64603412500 is 521430646.

It can be written as a sum of positive squares in 6 ways, for example, as 55558261264 + 9045151236 = 235708^2 + 95106^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 183012324 + ... + 183012676.

It is an arithmetic number, because the mean of its divisors is an integer number (866007723).

Almost surely, 2^64603412500 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 64603412500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77940695070).

64603412500 is an abundant number, since it is smaller than the sum of its proper divisors (91277977640).

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

64603412500 is an frugal number, since it uses more digits than its factorization.

64603412500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 64603412500 in words is "sixty-four billion, six hundred three million, four hundred twelve thousand, five hundred".