64503145 has 32 divisors (see below), whose sum is σ = 90948096. Its totient is φ = 43008000.

The previous prime is 64503137. The next prime is 64503181. The reversal of 64503145 is 54130546.

It is not a de Polignac number, because 64503145 - 2³ = 64503137 is a prime.

It is a super-3 number, since 3×64503145³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

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, 250857 + ... + 251113.

It is an arithmetic number, because the mean of its divisors is an integer number (2842128).

Almost surely, 2^64503145 is an apocalyptic number.

It is an amenable number.

64503145 is a deficient number, since it is larger than the sum of its proper divisors (26444951).

64503145 is a wasteful number, since it uses less digits than its factorization.

64503145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 64503145 is about 8031.3849988654. The cubic root of 64503145 is about 401.0454837784.

The spelling of 64503145 in words is "sixty-four million, five hundred three thousand, one hundred forty-five".