64144666125 has 96 divisors (see below), whose sum is σ = 121897077120. Its totient is φ = 33283483200.

The previous prime is 64144666111. The next prime is 64144666133. The reversal of 64144666125 is 52166644146.

It is not a de Polignac number, because 64144666125 - 2⁴ = 64144666109 is a prime.

It is a super-2 number, since 2×64144666125² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4613434 + ... + 4627316.

It is an arithmetic number, because the mean of its divisors is an integer number (1269761220).

Almost surely, 2^64144666125 is an apocalyptic number.

It is an amenable number.

64144666125 is a deficient number, since it is larger than the sum of its proper divisors (57752410995).

64144666125 is a wasteful number, since it uses less digits than its factorization.

64144666125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13981 (or 13928 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The spelling of 64144666125 in words is "sixty-four billion, one hundred forty-four million, six hundred sixty-six thousand, one hundred twenty-five".