64745358055505 has 8 divisors (see below), whose sum is σ = 77695603323624. Its totient is φ = 51795504006400.

The previous prime is 64745358055493. The next prime is 64745358055529. The reversal of 64745358055505 is 50555085354746.

It can be written as a sum of positive squares in 4 ways, for example, as 20238193721344 + 44507164334161 = 4498688^2 + 6671369^2 .

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

It is not a de Polignac number, because 64745358055505 - 2⁴ = 64745358055489 is a prime.

It is a super-2 number, since 2×64745358055505² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon 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, 97440536 + ... + 98102745.

It is an arithmetic number, because the mean of its divisors is an integer number (9711950415453).

Almost surely, 2^{64745358055505} is an apocalyptic number.

It is an amenable number.

64745358055505 is a deficient number, since it is larger than the sum of its proper divisors (12950245268119).

64745358055505 is a wasteful number, since it uses less digits than its factorization.

64745358055505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195609507.

The product of its (nonzero) digits is 252000000, while the sum is 62.

The spelling of 64745358055505 in words is "sixty-four trillion, seven hundred forty-five billion, three hundred fifty-eight million, fifty-five thousand, five hundred five".