64720162727 has 4 divisors (see below), whose sum is σ = 70603813896. Its totient is φ = 58836511560.

The previous prime is 64720162711. The next prime is 64720162757. The reversal of 64720162727 is 72726102746.

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 64720162727 - 2⁴ = 64720162711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64720162757) 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, 2941825568 + ... + 2941825589.

It is an arithmetic number, because the mean of its divisors is an integer number (17650953474).

Almost surely, 2^64720162727 is an apocalyptic number.

64720162727 is a deficient number, since it is larger than the sum of its proper divisors (5883651169).

64720162727 is a wasteful number, since it uses less digits than its factorization.

64720162727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5883651168.

The product of its (nonzero) digits is 395136, while the sum is 44.

The spelling of 64720162727 in words is "sixty-four billion, seven hundred twenty million, one hundred sixty-two thousand, seven hundred twenty-seven".