155500551112 has 16 divisors (see below), whose sum is σ = 291570741360. Its totient is φ = 77748353424.

The previous prime is 155500551077. The next prime is 155500551137. The reversal of 155500551112 is 211155005551.

It is a happy number.

It is a super-2 number, since 2×155500551112² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138723 + ... + 574669.

It is an arithmetic number, because the mean of its divisors is an integer number (18223171335).

Almost surely, 2^155500551112 is an apocalyptic number.

It is an amenable number.

155500551112 is a deficient number, since it is larger than the sum of its proper divisors (136070190248).

155500551112 is a wasteful number, since it uses less digits than its factorization.

155500551112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480540 (or 480536 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 31.

Adding to 155500551112 its reverse (211155005551), we get a palindrome (366655556663).

The spelling of 155500551112 in words is "one hundred fifty-five billion, five hundred million, five hundred fifty-one thousand, one hundred twelve".