64642452 has 24 divisors (see below), whose sum is σ = 172380096. Its totient is φ = 18469248.

The previous prime is 64642451. The next prime is 64642453. The reversal of 64642452 is 25424646.

It is an interprime number because it is at equal distance from previous prime (64642451) and next prime (64642453).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64642451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384693 + ... + 384860.

It is an arithmetic number, because the mean of its divisors is an integer number (7182504).

Almost surely, 2^64642452 is an apocalyptic number.

It is an amenable number.

64642452 is an abundant number, since it is smaller than the sum of its proper divisors (107737644).

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

64642452 is a wasteful number, since it uses less digits than its factorization.

64642452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769567 (or 769565 counting only the distinct ones).

The product of its digits is 46080, while the sum is 33.

The square root of 64642452 is about 8040.0529849000. The cubic root of 64642452 is about 401.3339879117. Note that the first 3 decimals are identical.

The spelling of 64642452 in words is "sixty-four million, six hundred forty-two thousand, four hundred fifty-two".