64542470 has 16 divisors (see below), whose sum is σ = 116268048. Its totient is φ = 25796640.

The previous prime is 64542463. The next prime is 64542503. The reversal of 64542470 is 7424546.

It is a Curzon number.

It is a congruent number.

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, 22772 + ... + 25448.

It is an arithmetic number, because the mean of its divisors is an integer number (7266753).

Almost surely, 2^64542470 is an apocalyptic number.

64542470 is a deficient number, since it is larger than the sum of its proper divisors (51725578).

64542470 is a wasteful number, since it uses less digits than its factorization.

64542470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5095.

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 64542470 is about 8033.8328337102. The cubic root of 64542470 is about 401.1269677109.

The spelling of 64542470 in words is "sixty-four million, five hundred forty-two thousand, four hundred seventy".