64609500 has 96 divisors (see below), whose sum is σ = 198132480. Its totient is φ = 16315200.

The previous prime is 64609483. The next prime is 64609541. The reversal of 64609500 is 590646.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27367 + ... + 29633.

It is an arithmetic number, because the mean of its divisors is an integer number (2063880).

Almost surely, 2^64609500 is an apocalyptic number.

64609500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64609500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99066240).

64609500 is an abundant number, since it is smaller than the sum of its proper divisors (133522980).

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

64609500 is a wasteful number, since it uses less digits than its factorization.

64609500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308 (or 2296 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 64609500 is about 8038.0034834528. The cubic root of 64609500 is about 401.2657819318.

The spelling of 64609500 in words is "sixty-four million, six hundred nine thousand, five hundred".