155540523432 has 32 divisors (see below), whose sum is σ = 444401496000. Its totient is φ = 44440149504.

The previous prime is 155540523389. The next prime is 155540523473. The reversal of 155540523432 is 234325045551.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462918057 + ... + 462918392.

It is an arithmetic number, because the mean of its divisors is an integer number (13887546750).

Almost surely, 2^155540523432 is an apocalyptic number.

155540523432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155540523432 is an abundant number, since it is smaller than the sum of its proper divisors (288860972568).

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

155540523432 is a wasteful number, since it uses less digits than its factorization.

155540523432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925836465 (or 925836461 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 39.

Adding to 155540523432 its reverse (234325045551), we get a palindrome (389865568983).

The spelling of 155540523432 in words is "one hundred fifty-five billion, five hundred forty million, five hundred twenty-three thousand, four hundred thirty-two".