78148428601525 has 12 divisors (see below), whose sum is σ = 102604289787972. Its totient is φ = 58841169770240.

The previous prime is 78148428601519. The next prime is 78148428601541. The reversal of 78148428601525 is 52510682484187.

It can be written as a sum of positive squares in 6 ways, for example, as 381322305169 + 77767106296356 = 617513^2 + 8818566^2 .

It is a de Polignac number, because none of the positive numbers 2^k-78148428601525 is a prime.

It is a super-2 number, since 2×78148428601525² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91939327342 + ... + 91939328191.

It is an arithmetic number, because the mean of its divisors is an integer number (8550357482331).

Almost surely, 2^{78148428601525} is an apocalyptic number.

It is an amenable number.

78148428601525 is a deficient number, since it is larger than the sum of its proper divisors (24455861186447).

78148428601525 is a wasteful number, since it uses less digits than its factorization.

78148428601525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183878655560 (or 183878655555 counting only the distinct ones).

The product of its (nonzero) digits is 34406400, while the sum is 61.

The spelling of 78148428601525 in words is "seventy-eight trillion, one hundred forty-eight billion, four hundred twenty-eight million, six hundred one thousand, five hundred twenty-five".