65403354453123 has 4 divisors (see below), whose sum is σ = 87204472604168. Its totient is φ = 43602236302080.

The previous prime is 65403354453113. The next prime is 65403354453133. The reversal of 65403354453123 is 32135445330456.

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

It is an interprime number because it is at equal distance from previous prime (65403354453113) and next prime (65403354453133).

It is a de Polignac number, because none of the positive numbers 2^k-65403354453123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65403354453103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10900559075518 + ... + 10900559075523.

It is an arithmetic number, because the mean of its divisors is an integer number (21801118151042).

Almost surely, 2^{65403354453123} is an apocalyptic number.

65403354453123 is a deficient number, since it is larger than the sum of its proper divisors (21801118151045).

65403354453123 is a wasteful number, since it uses less digits than its factorization.

65403354453123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21801118151044.

The product of its (nonzero) digits is 7776000, while the sum is 48.

Adding to 65403354453123 its reverse (32135445330456), we get a palindrome (97538799783579).

The spelling of 65403354453123 in words is "sixty-five trillion, four hundred three billion, three hundred fifty-four million, four hundred fifty-three thousand, one hundred twenty-three".