155040431525204 has 24 divisors (see below), whose sum is σ = 276210774010080. Its totient is φ = 76125842398496.

The previous prime is 155040431525179. The next prime is 155040431525227. The reversal of 155040431525204 is 402525134040551.

It is a happy number.

It is a congruent number.

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, 346635527 + ... + 347082510.

It is an arithmetic number, because the mean of its divisors is an integer number (11508782250420).

Almost surely, 2^{155040431525204} is an apocalyptic number.

It is an amenable number.

155040431525204 is a deficient number, since it is larger than the sum of its proper divisors (121170342484876).

155040431525204 is a wasteful number, since it uses less digits than its factorization.

155040431525204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693719047 (or 693719045 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 41.

Adding to 155040431525204 its reverse (402525134040551), we get a palindrome (557565565565755).

The spelling of 155040431525204 in words is "one hundred fifty-five trillion, forty billion, four hundred thirty-one million, five hundred twenty-five thousand, two hundred four".