78804247124431 has 2 divisors, whose sum is σ = 78804247124432. Its totient is φ = 78804247124430.

The previous prime is 78804247124399. The next prime is 78804247124443. The reversal of 78804247124431 is 13442174240887.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78804247124431 - 2⁵ = 78804247124399 is a prime.

It is a super-2 number, since 2×78804247124431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78804247124131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39402123562215 + 39402123562216.

It is an arithmetic number, because the mean of its divisors is an integer number (39402123562216).

Almost surely, 2^{78804247124431} is an apocalyptic number.

78804247124431 is a deficient number, since it is larger than the sum of its proper divisors (1).

78804247124431 is an equidigital number, since it uses as much as digits as its factorization.

78804247124431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9633792, while the sum is 55.

The spelling of 78804247124431 in words is "seventy-eight trillion, eight hundred four billion, two hundred forty-seven million, one hundred twenty-four thousand, four hundred thirty-one".