64125544499 has 4 divisors (see below), whose sum is σ = 64126976640. Its totient is φ = 64124112360.

The previous prime is 64125544453. The next prime is 64125544513. The reversal of 64125544499 is 99444552146.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64125544499 is a prime.

It is a super-2 number, since 2×64125544499² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64125544499.

It is not an unprimeable number, because it can be changed into a prime (64125544199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646664 + ... + 739205.

It is an arithmetic number, because the mean of its divisors is an integer number (16031744160).

Almost surely, 2^64125544499 is an apocalyptic number.

64125544499 is a deficient number, since it is larger than the sum of its proper divisors (1432141).

64125544499 is a wasteful number, since it uses less digits than its factorization.

64125544499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432140.

The product of its digits is 6220800, while the sum is 53.

The spelling of 64125544499 in words is "sixty-four billion, one hundred twenty-five million, five hundred forty-four thousand, four hundred ninety-nine".