64648061 has 4 divisors (see below), whose sum is σ = 64710624. Its totient is φ = 64585500.

The previous prime is 64648057. The next prime is 64648081. The reversal of 64648061 is 16084646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64648061 - 2² = 64648057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64648081) 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, 29705 + ... + 31806.

It is an arithmetic number, because the mean of its divisors is an integer number (16177656).

Almost surely, 2^64648061 is an apocalyptic number.

It is an amenable number.

64648061 is a deficient number, since it is larger than the sum of its proper divisors (62563).

64648061 is a wasteful number, since it uses less digits than its factorization.

64648061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62562.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 64648061 is about 8040.4017934429. The cubic root of 64648061 is about 401.3455954398.

The spelling of 64648061 in words is "sixty-four million, six hundred forty-eight thousand, sixty-one".