148971073681 has 4 divisors (see below), whose sum is σ = 148972126500. Its totient is φ = 148970020864.

The previous prime is 148971073607. The next prime is 148971073709. The reversal of 148971073681 is 186370179841.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 186370179841 = 51461 ⋅3621581.

It can be written as a sum of positive squares in 2 ways, for example, as 77997318400 + 70973755281 = 279280^2 + 266409^2 .

It is a cyclic number.

It is not a de Polignac number, because 148971073681 - 2¹³ = 148971065489 is a prime.

It is a super-2 number, since 2×148971073681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148971073081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273736 + ... + 610633.

It is an arithmetic number, because the mean of its divisors is an integer number (37243031625).

Almost surely, 2^148971073681 is an apocalyptic number.

It is an amenable number.

148971073681 is a deficient number, since it is larger than the sum of its proper divisors (1052819).

148971073681 is an equidigital number, since it uses as much as digits as its factorization.

148971073681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052818.

The product of its (nonzero) digits is 2032128, while the sum is 55.

The spelling of 148971073681 in words is "one hundred forty-eight billion, nine hundred seventy-one million, seventy-three thousand, six hundred eighty-one".