78148428601552 has 20 divisors (see below), whose sum is σ = 151412837653476. Its totient is φ = 39074147916800.

The previous prime is 78148428601541. The next prime is 78148428601561. The reversal of 78148428601552 is 25510682484187.

It can be written as a sum of positive squares in 2 ways, for example, as 7881854111296 + 70266574490256 = 2807464^2 + 8382516^2 .

It is a super-2 number, since 2×78148428601552² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6371418 + ... + 14031814.

Almost surely, 2^{78148428601552} is an apocalyptic number.

It is an amenable number.

78148428601552 is a deficient number, since it is larger than the sum of its proper divisors (73264409051924).

78148428601552 is a wasteful number, since it uses less digits than its factorization.

78148428601552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8298006 (or 8298000 counting only the distinct ones).

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

The spelling of 78148428601552 in words is "seventy-eight trillion, one hundred forty-eight billion, four hundred twenty-eight million, six hundred one thousand, five hundred fifty-two".