64125605545 has 8 divisors (see below), whose sum is σ = 76952895624. Its totient is φ = 51299038464.

The previous prime is 64125605527. The next prime is 64125605563. The reversal of 64125605545 is 54550652146.

It is an interprime number because it is at equal distance from previous prime (64125605527) and next prime (64125605563).

It can be written as a sum of positive squares in 4 ways, for example, as 796876441 + 63328729104 = 28229^2 + 251652^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64125605545 - 2¹³ = 64125597353 is a prime.

It is a super-2 number, since 2×64125605545² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38577 + ... + 360193.

It is an arithmetic number, because the mean of its divisors is an integer number (9619111953).

Almost surely, 2^64125605545 is an apocalyptic number.

It is an amenable number.

64125605545 is a deficient number, since it is larger than the sum of its proper divisors (12827290079).

64125605545 is a wasteful number, since it uses less digits than its factorization.

64125605545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361499.

The product of its (nonzero) digits is 720000, while the sum is 43.

The spelling of 64125605545 in words is "sixty-four billion, one hundred twenty-five million, six hundred five thousand, five hundred forty-five".