78292129541 has 2 divisors, whose sum is σ = 78292129542. Its totient is φ = 78292129540.

The previous prime is 78292129507. The next prime is 78292129607. The reversal of 78292129541 is 14592129287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65234268100 + 13057861441 = 255410^2 + 114271^2 .

It is an emirp because it is prime and its reverse (14592129287) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78292129541 is a prime.

It is a super-2 number, since 2×78292129541² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78292129541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78292129441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39146064770 + 39146064771.

It is an arithmetic number, because the mean of its divisors is an integer number (39146064771).

Almost surely, 2^78292129541 is an apocalyptic number.

It is an amenable number.

78292129541 is a deficient number, since it is larger than the sum of its proper divisors (1).

78292129541 is an equidigital number, since it uses as much as digits as its factorization.

78292129541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 50.

The spelling of 78292129541 in words is "seventy-eight billion, two hundred ninety-two million, one hundred twenty-nine thousand, five hundred forty-one".