155521103662042 has 16 divisors (see below), whose sum is σ = 235007708644800. Its totient is φ = 77185428246720.

The previous prime is 155521103661991. The next prime is 155521103662091. The reversal of 155521103662042 is 240266301125551.

It is a super-2 number, since 2×155521103662042² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155521103662042.

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, 55496559 + ... + 58231522.

It is an arithmetic number, because the mean of its divisors is an integer number (14687981790300).

Almost surely, 2^{155521103662042} is an apocalyptic number.

155521103662042 is a deficient number, since it is larger than the sum of its proper divisors (79486604982758).

155521103662042 is a wasteful number, since it uses less digits than its factorization.

155521103662042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113733141.

The product of its (nonzero) digits is 432000, while the sum is 43.

Adding to 155521103662042 its reverse (240266301125551), we get a palindrome (395787404787593).

The spelling of 155521103662042 in words is "one hundred fifty-five trillion, five hundred twenty-one billion, one hundred three million, six hundred sixty-two thousand, forty-two".