65394623125 has 30 divisors (see below), whose sum is σ = 88034084138. Its totient is φ = 48274392000.

The previous prime is 65394623123. The next prime is 65394623143. The reversal of 65394623125 is 52132649356.

It can be written as a sum of positive squares in 15 ways, for example, as 39175889041 + 26218734084 = 197929^2 + 161922^2 .

It is not a de Polignac number, because 65394623125 - 2¹ = 65394623123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65394623123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 23049207 + ... + 23052043.

Almost surely, 2^65394623125 is an apocalyptic number.

65394623125 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65394623125 is a deficient number, since it is larger than the sum of its proper divisors (22639461013).

65394623125 is an frugal number, since it uses more digits than its factorization.

65394623125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5707 (or 2855 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 46.

The spelling of 65394623125 in words is "sixty-five billion, three hundred ninety-four million, six hundred twenty-three thousand, one hundred twenty-five".