2111623642 has 4 divisors (see below), whose sum is σ = 3167435466. Its totient is φ = 1055811820.

The previous prime is 2111623609. The next prime is 2111623687. The reversal of 2111623642 is 2463261112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2073071961 + 38551681 = 45531^2 + 6209^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2111623642.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527905909 + ... + 527905912.

Almost surely, 2^2111623642 is an apocalyptic number.

2111623642 is a deficient number, since it is larger than the sum of its proper divisors (1055811824).

2111623642 is a wasteful number, since it uses less digits than its factorization.

2111623642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055811823.

The product of its digits is 3456, while the sum is 28.

The square root of 2111623642 is about 45952.4062699659. The cubic root of 2111623642 is about 1282.9375165363.

Adding to 2111623642 its reverse (2463261112), we get a palindrome (4574884754).

The spelling of 2111623642 in words is "two billion, one hundred eleven million, six hundred twenty-three thousand, six hundred forty-two".