64749114457 has 4 divisors (see below), whose sum is σ = 65343143140. Its totient is φ = 64155085776.

The previous prime is 64749114439. The next prime is 64749114481. The reversal of 64749114457 is 75441194746.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17779822281 + 46969292176 = 133341^2 + 216724^2 .

It is a cyclic number.

It is not a de Polignac number, because 64749114457 - 2¹⁵ = 64749081689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64749114427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297014178 + ... + 297014395.

It is an arithmetic number, because the mean of its divisors is an integer number (16335785785).

Almost surely, 2^64749114457 is an apocalyptic number.

It is an amenable number.

64749114457 is a deficient number, since it is larger than the sum of its proper divisors (594028683).

64749114457 is a wasteful number, since it uses less digits than its factorization.

64749114457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594028682.

The product of its digits is 3386880, while the sum is 52.

The spelling of 64749114457 in words is "sixty-four billion, seven hundred forty-nine million, one hundred fourteen thousand, four hundred fifty-seven".