64506901 has 4 divisors (see below), whose sum is σ = 64523404. Its totient is φ = 64490400.

The previous prime is 64506839. The next prime is 64506913. The reversal of 64506901 is 10960546.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13727025 + 50779876 = 3705^2 + 7126^2 .

It is a cyclic number.

It is not a de Polignac number, because 64506901 - 2⁷ = 64506773 is a prime.

It is a super-2 number, since 2×64506901² = 8322280553247602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64506931) 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, 1291 + ... + 11431.

It is an arithmetic number, because the mean of its divisors is an integer number (16130851).

Almost surely, 2^64506901 is an apocalyptic number.

It is an amenable number.

64506901 is a deficient number, since it is larger than the sum of its proper divisors (16503).

64506901 is a wasteful number, since it uses less digits than its factorization.

64506901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16502.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 64506901 is about 8031.6188281068. The cubic root of 64506901 is about 401.0532678826.

The spelling of 64506901 in words is "sixty-four million, five hundred six thousand, nine hundred one".