2155641434342 has 16 divisors (see below), whose sum is σ = 3527458384464. Its totient is φ = 979824480000.

The previous prime is 2155641434339. The next prime is 2155641434351. The reversal of 2155641434342 is 2434341465512.

It is a junction number, because it is equal to n+sod(n) for n = 2155641434293 and 2155641434302.

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, 1257842 + ... + 2427642.

It is an arithmetic number, because the mean of its divisors is an integer number (220466149029).

Almost surely, 2^{2155641434342} is an apocalyptic number.

2155641434342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2155641434342 is a deficient number, since it is larger than the sum of its proper divisors (1371816950122).

2155641434342 is a wasteful number, since it uses less digits than its factorization.

2155641434342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253575.

The product of its digits is 1382400, while the sum is 44.

Adding to 2155641434342 its reverse (2434341465512), we get a palindrome (4589982899854).

The spelling of 2155641434342 in words is "two trillion, one hundred fifty-five billion, six hundred forty-one million, four hundred thirty-four thousand, three hundred forty-two".