155331121394 has 8 divisors (see below), whose sum is σ = 233001055980. Its totient is φ = 77664102736.

The previous prime is 155331121357. The next prime is 155331121441. The reversal of 155331121394 is 493121133551.

It can be written as a sum of positive squares in 2 ways, for example, as 143675112025 + 11656009369 = 379045^2 + 107963^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590549 + ... + 812040.

Almost surely, 2^155331121394 is an apocalyptic number.

155331121394 is a deficient number, since it is larger than the sum of its proper divisors (77669934586).

155331121394 is a wasteful number, since it uses less digits than its factorization.

155331121394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457964.

The product of its digits is 48600, while the sum is 38.

The spelling of 155331121394 in words is "one hundred fifty-five billion, three hundred thirty-one million, one hundred twenty-one thousand, three hundred ninety-four".