78148408203149 has 2 divisors, whose sum is σ = 78148408203150. Its totient is φ = 78148408203148.

The previous prime is 78148408203143. The next prime is 78148408203167. The reversal of 78148408203149 is 94130280484187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68857384861225 + 9291023341924 = 8298035^2 + 3048118^2 .

It is a cyclic number.

It is not a de Polignac number, because 78148408203149 - 2¹² = 78148408199053 is a prime.

It is a super-2 number, since 2×78148408203149² (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 (78148408203143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39074204101574 + 39074204101575.

It is an arithmetic number, because the mean of its divisors is an integer number (39074204101575).

Almost surely, 2^{78148408203149} is an apocalyptic number.

It is an amenable number.

78148408203149 is a deficient number, since it is larger than the sum of its proper divisors (1).

78148408203149 is an equidigital number, since it uses as much as digits as its factorization.

78148408203149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12386304, while the sum is 59.

The spelling of 78148408203149 in words is "seventy-eight trillion, one hundred forty-eight billion, four hundred eight million, two hundred three thousand, one hundred forty-nine".