78362558831 has 2 divisors, whose sum is σ = 78362558832. Its totient is φ = 78362558830.

The previous prime is 78362558759. The next prime is 78362558837. The reversal of 78362558831 is 13885526387.

It is a strong prime.

It is an emirp because it is prime and its reverse (13885526387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78362558831 - 2¹⁰ = 78362557807 is a prime.

It is a super-2 number, since 2×78362558831² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78362558837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39181279415 + 39181279416.

It is an arithmetic number, because the mean of its divisors is an integer number (39181279416).

Almost surely, 2^78362558831 is an apocalyptic number.

78362558831 is a deficient number, since it is larger than the sum of its proper divisors (1).

78362558831 is an equidigital number, since it uses as much as digits as its factorization.

78362558831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9676800, while the sum is 56.

The spelling of 78362558831 in words is "seventy-eight billion, three hundred sixty-two million, five hundred fifty-eight thousand, eight hundred thirty-one".