64200071 has 4 divisors (see below), whose sum is σ = 69138552. Its totient is φ = 59261592.

The previous prime is 64200067. The next prime is 64200079. The reversal of 64200071 is 17000246.

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

It is not a de Polignac number, because 64200071 - 2² = 64200067 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 (64200079) 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, 2469221 + ... + 2469246.

It is an arithmetic number, because the mean of its divisors is an integer number (17284638).

Almost surely, 2^64200071 is an apocalyptic number.

64200071 is a deficient number, since it is larger than the sum of its proper divisors (4938481).

64200071 is a wasteful number, since it uses less digits than its factorization.

64200071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4938480.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 64200071 is about 8012.4946801854. The cubic root of 64200071 is about 400.4163810001.

The spelling of 64200071 in words is "sixty-four million, two hundred thousand, seventy-one".