78749157029 has 2 divisors, whose sum is σ = 78749157030. Its totient is φ = 78749157028.

The previous prime is 78749156989. The next prime is 78749157031. The reversal of 78749157029 is 92075194787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72968596129 + 5780560900 = 270127^2 + 76030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78749157029 is a prime.

Together with 78749157031, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78709157029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39374578514 + 39374578515.

It is an arithmetic number, because the mean of its divisors is an integer number (39374578515).

Almost surely, 2^78749157029 is an apocalyptic number.

It is an amenable number.

78749157029 is a deficient number, since it is larger than the sum of its proper divisors (1).

78749157029 is an equidigital number, since it uses as much as digits as its factorization.

78749157029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8890560, while the sum is 59.

The spelling of 78749157029 in words is "seventy-eight billion, seven hundred forty-nine million, one hundred fifty-seven thousand, twenty-nine".