64977545 has 8 divisors (see below), whose sum is σ = 80661960. Its totient is φ = 50189440.

The previous prime is 64977527. The next prime is 64977551. The reversal of 64977545 is 54577946.

It can be written as a sum of positive squares in 4 ways, for example, as 20675209 + 44302336 = 4547^2 + 6656^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64977545 - 2¹⁴ = 64961161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64977545.

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 7 ways as a sum of consecutive naturals, for example, 223916 + ... + 224205.

It is an arithmetic number, because the mean of its divisors is an integer number (10082745).

Almost surely, 2^64977545 is an apocalyptic number.

It is an amenable number.

64977545 is a deficient number, since it is larger than the sum of its proper divisors (15684415).

64977545 is a wasteful number, since it uses less digits than its factorization.

64977545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448155.

The product of its digits is 1058400, while the sum is 47.

The square root of 64977545 is about 8060.8650280227. The cubic root of 64977545 is about 402.0262703227.

The spelling of 64977545 in words is "sixty-four million, nine hundred seventy-seven thousand, five hundred forty-five".