64781952 has 64 divisors (see below), whose sum is σ = 174509760. Its totient is φ = 21288960.

The previous prime is 64781947. The next prime is 64781987. The reversal of 64781952 is 25918746.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26877 + ... + 29187.

It is an arithmetic number, because the mean of its divisors is an integer number (2726715).

Almost surely, 2^64781952 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 64781952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87254880).

64781952 is an abundant number, since it is smaller than the sum of its proper divisors (109727808).

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

64781952 is a wasteful number, since it uses less digits than its factorization.

64781952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2401 (or 2389 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 64781952 is about 8048.7236255198. The cubic root of 64781952 is about 401.6224766921.

The spelling of 64781952 in words is "sixty-four million, seven hundred eighty-one thousand, nine hundred fifty-two".