64981475 has 24 divisors (see below), whose sum is σ = 87338160. Its totient is φ = 47675520.

The previous prime is 64981451. The next prime is 64981541. The reversal of 64981475 is 57418946.

It is not a de Polignac number, because 64981475 - 2¹² = 64977379 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 57617 + ... + 58733.

It is an arithmetic number, because the mean of its divisors is an integer number (3639090).

Almost surely, 2^64981475 is an apocalyptic number.

64981475 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

64981475 is a deficient number, since it is larger than the sum of its proper divisors (22356685).

64981475 is a wasteful number, since it uses less digits than its factorization.

64981475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319 (or 1314 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The square root of 64981475 is about 8061.1087947006. The cubic root of 64981475 is about 402.0343753349.

It can be divided in two parts, 64981 and 475, that added together give a palindrome (65456).

The spelling of 64981475 in words is "sixty-four million, nine hundred eighty-one thousand, four hundred seventy-five".