2161253063126 has 32 divisors (see below), whose sum is σ = 3492487584000. Its totient is φ = 1000771107840.

The previous prime is 2161253063059. The next prime is 2161253063131. The reversal of 2161253063126 is 6213603521612.

It is a self number, because there is not a number n which added to its sum of digits gives 2161253063126.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5115551 + ... + 5521898.

It is an arithmetic number, because the mean of its divisors is an integer number (109140237000).

Almost surely, 2^{2161253063126} is an apocalyptic number.

2161253063126 is a deficient number, since it is larger than the sum of its proper divisors (1331234520874).

2161253063126 is a wasteful number, since it uses less digits than its factorization.

2161253063126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10637624.

The product of its (nonzero) digits is 77760, while the sum is 38.

Adding to 2161253063126 its reverse (6213603521612), we get a palindrome (8374856584738).

The spelling of 2161253063126 in words is "two trillion, one hundred sixty-one billion, two hundred fifty-three million, sixty-three thousand, one hundred twenty-six".