64716140 has 12 divisors (see below), whose sum is σ = 135903936. Its totient is φ = 25886448.

The previous prime is 64716137. The next prime is 64716143. The reversal of 64716140 is 4161746.

It is an interprime number because it is at equal distance from previous prime (64716137) and next prime (64716143).

It is not an unprimeable number, because it can be changed into a prime (64716143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1617884 + ... + 1617923.

It is an arithmetic number, because the mean of its divisors is an integer number (11325328).

Almost surely, 2^64716140 is an apocalyptic number.

It is an amenable number.

64716140 is an abundant number, since it is smaller than the sum of its proper divisors (71187796).

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

64716140 is a wasteful number, since it uses less digits than its factorization.

64716140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235816 (or 3235814 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 64716140 is about 8044.6342365579. The cubic root of 64716140 is about 401.4864278220.

Adding to 64716140 its reverse (4161746), we get a palindrome (68877886).

The spelling of 64716140 in words is "sixty-four million, seven hundred sixteen thousand, one hundred forty".