78148428601541 has 2 divisors, whose sum is σ = 78148428601542. Its totient is φ = 78148428601540.

The previous prime is 78148428601519. The next prime is 78148428601561. The reversal of 78148428601541 is 14510682484187.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56575654979041 + 21572773622500 = 7521679^2 + 4644650^2 .

It is a cyclic number.

It is not a de Polignac number, because 78148428601541 - 2⁴⁶ = 7779684423877 is a prime.

It is a super-2 number, since 2×78148428601541² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78148428601501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39074214300770 + 39074214300771.

It is an arithmetic number, because the mean of its divisors is an integer number (39074214300771).

Almost surely, 2^{78148428601541} is an apocalyptic number.

It is an amenable number.

78148428601541 is a deficient number, since it is larger than the sum of its proper divisors (1).

78148428601541 is an equidigital number, since it uses as much as digits as its factorization.

78148428601541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13762560, while the sum is 59.

The spelling of 78148428601541 in words is "seventy-eight trillion, one hundred forty-eight billion, four hundred twenty-eight million, six hundred one thousand, five hundred forty-one".