64973689432 has 16 divisors (see below), whose sum is σ = 121923225000. Its totient is φ = 32460829440.

The previous prime is 64973689387. The next prime is 64973689439. The reversal of 64973689432 is 23498637946.

64973689432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64973689439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3241294 + ... + 3261277.

Almost surely, 2^64973689432 is an apocalyptic number.

It is an amenable number.

64973689432 is a deficient number, since it is larger than the sum of its proper divisors (56949535568).

64973689432 is a wasteful number, since it uses less digits than its factorization.

64973689432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6503826 (or 6503822 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 61.

The spelling of 64973689432 in words is "sixty-four billion, nine hundred seventy-three million, six hundred eighty-nine thousand, four hundred thirty-two".