2155641323006 has 16 divisors (see below), whose sum is σ = 3521011237200. Its totient is φ = 985883145408.

The previous prime is 2155641322999. The next prime is 2155641323021. The reversal of 2155641323006 is 6003231465512.

It is a Harshad number since it is a multiple of its sum of digits (38).

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, 978057575 + ... + 978059778.

It is an arithmetic number, because the mean of its divisors is an integer number (220063202325).

Almost surely, 2^{2155641323006} is an apocalyptic number.

2155641323006 is a deficient number, since it is larger than the sum of its proper divisors (1365369914194).

2155641323006 is a wasteful number, since it uses less digits than its factorization.

2155641323006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956117403.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 2155641323006 its reverse (6003231465512), we get a palindrome (8158872788518).

The spelling of 2155641323006 in words is "two trillion, one hundred fifty-five billion, six hundred forty-one million, three hundred twenty-three thousand, six".