2164560215642 has 24 divisors (see below), whose sum is σ = 3569314310100. Its totient is φ = 983760525440.

The previous prime is 2164560215627. The next prime is 2164560215647. The reversal of 2164560215642 is 2465120654612.

It can be written as a sum of positive squares in 2 ways, for example, as 1767434643601 + 397125572041 = 1329449^2 + 630179^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2164560215593 and 2164560215602.

It is not an unprimeable number, because it can be changed into a prime (2164560215647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1247234 + ... + 2425842.

Almost surely, 2^{2164560215642} is an apocalyptic number.

2164560215642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2164560215642 is a deficient number, since it is larger than the sum of its proper divisors (1404754094458).

2164560215642 is a wasteful number, since it uses less digits than its factorization.

2164560215642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186222 (or 1186211 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 2164560215642 in words is "two trillion, one hundred sixty-four billion, five hundred sixty million, two hundred fifteen thousand, six hundred forty-two".