64436121 has 16 divisors (see below), whose sum is σ = 96808320. Its totient is φ = 42351120.

The previous prime is 64436077. The next prime is 64436131. The reversal of 64436121 is 12163446.

64436121 is a `hidden beast` number, since 6 + 4 + 43 + 612 + 1 = 666.

It is not a de Polignac number, because 64436121 - 2¹⁰ = 64435097 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (64436131) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 14890 + ... + 18723.

It is an arithmetic number, because the mean of its divisors is an integer number (6050520).

Almost surely, 2^64436121 is an apocalyptic number.

It is an amenable number.

64436121 is a deficient number, since it is larger than the sum of its proper divisors (32372199).

64436121 is a wasteful number, since it uses less digits than its factorization.

64436121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33693 (or 33687 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 64436121 is about 8027.2112841260. The cubic root of 64436121 is about 400.9065293758.

Adding to 64436121 its reverse (12163446), we get a palindrome (76599567).

The spelling of 64436121 in words is "sixty-four million, four hundred thirty-six thousand, one hundred twenty-one".