2172911620090 has 32 divisors (see below), whose sum is σ = 3981523714560. Its totient is φ = 853575808704.

The previous prime is 2172911620073. The next prime is 2172911620097. The reversal of 2172911620090 is 900261192712.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2172911620097) 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, 1258762 + ... + 2435221.

It is an arithmetic number, because the mean of its divisors is an integer number (124422616080).

Almost surely, 2^{2172911620090} is an apocalyptic number.

2172911620090 is a deficient number, since it is larger than the sum of its proper divisors (1808612094470).

2172911620090 is a wasteful number, since it uses less digits than its factorization.

2172911620090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3695046.

The product of its (nonzero) digits is 27216, while the sum is 40.

It can be divided in two parts, 217291 and 1620090, that added together give a palindrome (1837381).

The spelling of 2172911620090 in words is "two trillion, one hundred seventy-two billion, nine hundred eleven million, six hundred twenty thousand, ninety".