64757730106123 has 4 divisors (see below), whose sum is σ = 64757785590288. Its totient is φ = 64757674621960.

The previous prime is 64757730106093. The next prime is 64757730106141. The reversal of 64757730106123 is 32160103775746.

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

It is a cyclic number.

It is not a de Polignac number, because 64757730106123 - 2⁹ = 64757730105611 is a prime.

It is a super-2 number, since 2×64757730106123² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64757730106423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25952911 + ... + 28338472.

It is an arithmetic number, because the mean of its divisors is an integer number (16189446397572).

Almost surely, 2^{64757730106123} is an apocalyptic number.

64757730106123 is a deficient number, since it is larger than the sum of its proper divisors (55484165).

64757730106123 is a wasteful number, since it uses less digits than its factorization.

64757730106123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55484164.

The product of its (nonzero) digits is 4445280, while the sum is 52.

The spelling of 64757730106123 in words is "sixty-four trillion, seven hundred fifty-seven billion, seven hundred thirty million, one hundred six thousand, one hundred twenty-three".