64155101 has 4 divisors (see below), whose sum is σ = 65034012. Its totient is φ = 63276192.

The previous prime is 64155083. The next prime is 64155107. The reversal of 64155101 is 10155146.

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 34234201 + 29920900 = 5851^2 + 5470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64155101 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 (64155107) 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, 439346 + ... + 439491.

It is an arithmetic number, because the mean of its divisors is an integer number (16258503).

Almost surely, 2^64155101 is an apocalyptic number.

It is an amenable number.

64155101 is a deficient number, since it is larger than the sum of its proper divisors (878911).

64155101 is an equidigital number, since it uses as much as digits as its factorization.

64155101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878910.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 64155101 is about 8009.6879464808. The cubic root of 64155101 is about 400.3228664064.

The spelling of 64155101 in words is "sixty-four million, one hundred fifty-five thousand, one hundred one".