148256571681 has 9 divisors (see below), whose sum is σ = 214150049841. Its totient is φ = 98836944372.

The previous prime is 148256571679. The next prime is 148256571713. The reversal of 148256571681 is 186175652841.

The square root of 148256571681 is 385041.

It is a perfect power (a square), and thus also a powerful number.

148256571681 is a `hidden beast` number, since 1 + 4 + 8 + 2 + 5 + 6 + 571 + 68 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 148256571681 - 2¹ = 148256571679 is a prime.

It is a super-2 number, since 2×148256571681² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (148256571781) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1090950 + ... + 1219296.

Almost surely, 2^148256571681 is an apocalyptic number.

148256571681 is the 385041-st square number.

148256571681 is the 192521-st centered octagonal number.

It is an amenable number.

148256571681 is a deficient number, since it is larger than the sum of its proper divisors (65893478160).

148256571681 is an frugal number, since it uses more digits than its factorization.

148256571681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256700 (or 128350 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 54.

The spelling of 148256571681 in words is "one hundred forty-eight billion, two hundred fifty-six million, five hundred seventy-one thousand, six hundred eighty-one".