64687546 has 48 divisors (see below), whose sum is σ = 128537280. Its totient is φ = 24097920.

The previous prime is 64687543. The next prime is 64687547. The reversal of 64687546 is 64578646.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 64687496 and 64687505.

It is not an unprimeable number, because it can be changed into a prime (64687543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23490 + ... + 26098.

It is an arithmetic number, because the mean of its divisors is an integer number (2677860).

Almost surely, 2^64687546 is an apocalyptic number.

64687546 is a deficient number, since it is larger than the sum of its proper divisors (63849734).

64687546 is a wasteful number, since it uses less digits than its factorization.

64687546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659 (or 2652 counting only the distinct ones).

The product of its digits is 967680, while the sum is 46.

The square root of 64687546 is about 8042.8568307536. The cubic root of 64687546 is about 401.4272885609.

Subtracting from 64687546 its reverse (64578646), we obtain a square (108900 = 330²).

The spelling of 64687546 in words is "sixty-four million, six hundred eighty-seven thousand, five hundred forty-six".