78133107529 has 3 divisors (see below), whose sum is σ = 78133387053. Its totient is φ = 78132828006.

The previous prime is 78133107497. The next prime is 78133107541. The reversal of 78133107529 is 92570133187.

The square root of 78133107529 is 279523.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 78133107529 - 2⁵ = 78133107497 is a prime.

It is a super-2 number, since 2×78133107529² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78133104529) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 139762 + ... + 419284.

It is an arithmetic number, because the mean of its divisors is an integer number (26044462351).

Almost surely, 2^78133107529 is an apocalyptic number.

78133107529 is the 279523-rd square number.

78133107529 is the 139762-nd centered octagonal number.

It is an amenable number.

78133107529 is a deficient number, since it is larger than the sum of its proper divisors (279524).

78133107529 is an frugal number, since it uses more digits than its factorization.

78133107529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559046 (or 279523 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 78133107529 in words is "seventy-eight billion, one hundred thirty-three million, one hundred seven thousand, five hundred twenty-nine".