64256645127 has 16 divisors (see below), whose sum is σ = 87851473920. Its totient is φ = 41751844800.

The previous prime is 64256645113. The next prime is 64256645147. The reversal of 64256645127 is 72154665246.

It is not a de Polignac number, because 64256645127 - 2¹¹ = 64256643079 is a prime.

It is a super-2 number, since 2×64256645127² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64256645147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130999 + ... + 381672.

It is an arithmetic number, because the mean of its divisors is an integer number (5490717120).

Almost surely, 2^64256645127 is an apocalyptic number.

64256645127 is a deficient number, since it is larger than the sum of its proper divisors (23594828793).

64256645127 is a wasteful number, since it uses less digits than its factorization.

64256645127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513734.

The product of its digits is 2419200, while the sum is 48.

The spelling of 64256645127 in words is "sixty-four billion, two hundred fifty-six million, six hundred forty-five thousand, one hundred twenty-seven".