155421423455332 has 6 divisors (see below), whose sum is σ = 271987491046838. Its totient is φ = 77710711727664.

The previous prime is 155421423455321. The next prime is 155421423455369. The reversal of 155421423455332 is 233554324124551.

It can be written as a sum of positive squares in only one way, i.e., 151449597668196 + 3971825787136 = 12306486^2 + 1992944^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19427677931913 + ... + 19427677931920.

Almost surely, 2^{155421423455332} is an apocalyptic number.

It is an amenable number.

155421423455332 is a deficient number, since it is larger than the sum of its proper divisors (116566067591506).

155421423455332 is a wasteful number, since it uses less digits than its factorization.

155421423455332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38855355863837 (or 38855355863835 counting only the distinct ones).

The product of its digits is 8640000, while the sum is 49.

Adding to 155421423455332 its reverse (233554324124551), we get a palindrome (388975747579883).

The spelling of 155421423455332 in words is "one hundred fifty-five trillion, four hundred twenty-one billion, four hundred twenty-three million, four hundred fifty-five thousand, three hundred thirty-two".