64481051 has 4 divisors (see below), whose sum is σ = 68274072. Its totient is φ = 60688032.

The previous prime is 64481033. The next prime is 64481057. The reversal of 64481051 is 15018446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64481051 - 2¹⁰ = 64480027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64481057) 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, 1896485 + ... + 1896518.

It is an arithmetic number, because the mean of its divisors is an integer number (17068518).

Almost surely, 2^64481051 is an apocalyptic number.

64481051 is a deficient number, since it is larger than the sum of its proper divisors (3793021).

64481051 is a wasteful number, since it uses less digits than its factorization.

64481051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3793020.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 64481051 is about 8030.0094022361. The cubic root of 64481051 is about 400.9996890564. Note that the first 3 decimals are identical.

Adding to 64481051 its reverse (15018446), we get a palindrome (79499497).

The spelling of 64481051 in words is "sixty-four million, four hundred eighty-one thousand, fifty-one".