64386433692 has 648 divisors, whose sum is σ = 217989058560. Its totient is φ = 15672683520.

The previous prime is 64386433691. The next prime is 64386433759. The reversal of 64386433692 is 29633468346.

64386433692 is a `hidden beast` number, since 6 + 43 + 86 + 433 + 6 + 92 = 666.

It is a super-2 number, since 2×64386433692² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64386433691) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 815018109 + ... + 815018187.

Almost surely, 2^64386433692 is an apocalyptic number.

64386433692 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64386433692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108994529280).

64386433692 is an abundant number, since it is smaller than the sum of its proper divisors (153602624868).

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

64386433692 is a wasteful number, since it uses less digits than its factorization.

64386433692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 158 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 54.

The spelling of 64386433692 in words is "sixty-four billion, three hundred eighty-six million, four hundred thirty-three thousand, six hundred ninety-two".