64919927424 has 256 divisors, whose sum is σ = 193341375360. Its totient is φ = 19129958400.

The previous prime is 64919927399. The next prime is 64919927431. The reversal of 64919927424 is 42472991946.

64919927424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96463152 + ... + 96463824.

Almost surely, 2^64919927424 is an apocalyptic number.

64919927424 is a gapful number since it is divisible by the number (64) 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 64919927424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96670687680).

64919927424 is an abundant number, since it is smaller than the sum of its proper divisors (128421447936).

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

64919927424 is a wasteful number, since it uses less digits than its factorization.

64919927424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299 (or 1287 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 57.

The spelling of 64919927424 in words is "sixty-four billion, nine hundred nineteen million, nine hundred twenty-seven thousand, four hundred twenty-four".