64509004 has 24 divisors (see below), whose sum is σ = 131765760. Its totient is φ = 27057936.

The previous prime is 64508993. The next prime is 64509013. The reversal of 64509004 is 40090546.

It is a super-2 number, since 2×64509004² = 8322823194144032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 23194 + ... + 25825.

It is an arithmetic number, because the mean of its divisors is an integer number (5490240).

Almost surely, 2^64509004 is an apocalyptic number.

It is an amenable number.

64509004 is an abundant number, since it is smaller than the sum of its proper divisors (67256756).

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

64509004 is a wasteful number, since it uses less digits than its factorization.

64509004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49077 (or 49075 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 64509004 is about 8031.7497470975. The cubic root of 64509004 is about 401.0576261029.

The spelling of 64509004 in words is "sixty-four million, five hundred nine thousand, four".