64540704 has 96 divisors (see below), whose sum is σ = 182238336. Its totient is φ = 19927040.

The previous prime is 64540703. The next prime is 64540711. The reversal of 64540704 is 40704546.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×64540704³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (64540703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115594 + ... + 116150.

It is an arithmetic number, because the mean of its divisors is an integer number (1898316).

Almost surely, 2^64540704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64540704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91119168).

64540704 is an abundant number, since it is smaller than the sum of its proper divisors (117697632).

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

64540704 is a wasteful number, since it uses less digits than its factorization.

64540704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 64540704 is about 8033.7229227799. The cubic root of 64540704 is about 401.1233091551.

The spelling of 64540704 in words is "sixty-four million, five hundred forty thousand, seven hundred four".