155604491238 has 48 divisors (see below), whose sum is σ = 362052048240. Its totient is φ = 44454320064.

The previous prime is 155604491221. The next prime is 155604491243. The reversal of 155604491238 is 832194406551.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 4743220 + ... + 4775912.

It is an arithmetic number, because the mean of its divisors is an integer number (7542751005).

Almost surely, 2^155604491238 is an apocalyptic number.

155604491238 is an abundant number, since it is smaller than the sum of its proper divisors (206447557002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155604491238 is a wasteful number, since it uses less digits than its factorization.

155604491238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48901 (or 48894 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

Adding to 155604491238 its reverse (832194406551), we get a palindrome (987798897789).

The spelling of 155604491238 in words is "one hundred fifty-five billion, six hundred four million, four hundred ninety-one thousand, two hundred thirty-eight".