148553821861 has 2 divisors, whose sum is σ = 148553821862. Its totient is φ = 148553821860.

The previous prime is 148553821841. The next prime is 148553821873. The reversal of 148553821861 is 168128355841.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74901289761 + 73652532100 = 273681^2 + 271390^2 .

It is a cyclic number.

It is not a de Polignac number, because 148553821861 - 2²⁵ = 148520267429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 148553821799 and 148553821808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148553821841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74276910930 + 74276910931.

It is an arithmetic number, because the mean of its divisors is an integer number (74276910931).

Almost surely, 2^148553821861 is an apocalyptic number.

It is an amenable number.

148553821861 is a deficient number, since it is larger than the sum of its proper divisors (1).

148553821861 is an equidigital number, since it uses as much as digits as its factorization.

148553821861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1843200, while the sum is 52.

The spelling of 148553821861 in words is "one hundred forty-eight billion, five hundred fifty-three million, eight hundred twenty-one thousand, eight hundred sixty-one".