148813932781 has 2 divisors, whose sum is σ = 148813932782. Its totient is φ = 148813932780.

The previous prime is 148813932763. The next prime is 148813932803. The reversal of 148813932781 is 187239318841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91043406756 + 57770526025 = 301734^2 + 240355^2 .

It is a cyclic number.

It is not a de Polignac number, because 148813932781 - 2⁵ = 148813932749 is a prime.

It is a super-2 number, since 2×148813932781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148813932181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74406966390 + 74406966391.

It is an arithmetic number, because the mean of its divisors is an integer number (74406966391).

Almost surely, 2^148813932781 is an apocalyptic number.

It is an amenable number.

148813932781 is a deficient number, since it is larger than the sum of its proper divisors (1).

148813932781 is an equidigital number, since it uses as much as digits as its factorization.

148813932781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 55.

The spelling of 148813932781 in words is "one hundred forty-eight billion, eight hundred thirteen million, nine hundred thirty-two thousand, seven hundred eighty-one".