64197606949632 has 216 divisors, whose sum is σ = 199414237386000. Its totient is φ = 19745336991744.

The previous prime is 64197606949627. The next prime is 64197606949747. The reversal of 64197606949632 is 23694960679146.

64197606949632 is a `hidden beast` number, since 6 + 4 + 1 + 9 + 7 + 606 + 9 + 4 + 9 + 6 + 3 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 75927219 + ... + 76768077.

Almost surely, 2^{64197606949632} 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 64197606949632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99707118693000).

64197606949632 is an abundant number, since it is smaller than the sum of its proper divisors (135216630436368).

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

64197606949632 is a wasteful number, since it uses less digits than its factorization.

64197606949632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843443 (or 843426 counting only the distinct ones).

The product of its (nonzero) digits is 634894848, while the sum is 72.

The spelling of 64197606949632 in words is "sixty-four trillion, one hundred ninety-seven billion, six hundred six million, nine hundred forty-nine thousand, six hundred thirty-two".