181428033855 has 32 divisors (see below), whose sum is σ = 302935426560. Its totient is φ = 92545580160.

The previous prime is 181428033847. The next prime is 181428033881. The reversal of 181428033855 is 558330824181.

It is not a de Polignac number, because 181428033855 - 2³ = 181428033847 is a prime.

It is a super-2 number, since 2×181428033855² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4887756 + ... + 4924734.

It is an arithmetic number, because the mean of its divisors is an integer number (9466732080).

Almost surely, 2^181428033855 is an apocalyptic number.

181428033855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

181428033855 is a deficient number, since it is larger than the sum of its proper divisors (121507392705).

181428033855 is a wasteful number, since it uses less digits than its factorization.

181428033855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51231.

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 181428033855 in words is "one hundred eighty-one billion, four hundred twenty-eight million, thirty-three thousand, eight hundred fifty-five".