2155641434330 has 32 divisors (see below), whose sum is σ = 3898517644800. Its totient is φ = 858185399232.

The previous prime is 2155641434267. The next prime is 2155641434333. The reversal of 2155641434330 is 334341465512.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2155641434333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1221704 + ... + 2409116.

It is an arithmetic number, because the mean of its divisors is an integer number (121828676400).

Almost surely, 2^{2155641434330} is an apocalyptic number.

2155641434330 is a deficient number, since it is larger than the sum of its proper divisors (1742876210470).

2155641434330 is a wasteful number, since it uses less digits than its factorization.

2155641434330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188278.

The product of its (nonzero) digits is 518400, while the sum is 41.

Adding to 2155641434330 its reverse (334341465512), we get a palindrome (2489982899842).

The spelling of 2155641434330 in words is "two trillion, one hundred fifty-five billion, six hundred forty-one million, four hundred thirty-four thousand, three hundred thirty".