64657554 has 48 divisors (see below), whose sum is σ = 145673472. Its totient is φ = 19017504.

The previous prime is 64657553. The next prime is 64657573. The reversal of 64657554 is 45575646.

64657554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (64657553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40479 + ... + 42045.

It is an arithmetic number, because the mean of its divisors is an integer number (3034864).

Almost surely, 2^64657554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64657554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72836736).

64657554 is an abundant number, since it is smaller than the sum of its proper divisors (81015918).

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

64657554 is a wasteful number, since it uses less digits than its factorization.

64657554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631 (or 1608 counting only the distinct ones).

The product of its digits is 504000, while the sum is 42.

The square root of 64657554 is about 8040.9921029684. The cubic root of 64657554 is about 401.3652391704.

The spelling of 64657554 in words is "sixty-four million, six hundred fifty-seven thousand, five hundred fifty-four".