64546840 has 16 divisors (see below), whose sum is σ = 145230480. Its totient is φ = 25818720.

The previous prime is 64546829. The next prime is 64546847. The reversal of 64546840 is 4864546.

It is a self number, because there is not a number n which added to its sum of digits gives 64546840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64546847) 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, 806796 + ... + 806875.

It is an arithmetic number, because the mean of its divisors is an integer number (9076905).

Almost surely, 2^64546840 is an apocalyptic number.

It is an amenable number.

64546840 is an abundant number, since it is smaller than the sum of its proper divisors (80683640).

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

64546840 is a wasteful number, since it uses less digits than its factorization.

64546840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613682 (or 1613678 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 64546840 is about 8034.1048038969. The cubic root of 64546840 is about 401.1360205887.

The spelling of 64546840 in words is "sixty-four million, five hundred forty-six thousand, eight hundred forty".