21776071162 has 4 divisors (see below), whose sum is σ = 32664106746. Its totient is φ = 10888035580.

The previous prime is 21776071159. The next prime is 21776071243. The reversal of 21776071162 is 26117067712.

It is a happy number.

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., 21082749601 + 693321561 = 145199^2 + 26331^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5444017789 + ... + 5444017792.

Almost surely, 2^21776071162 is an apocalyptic number.

21776071162 is a deficient number, since it is larger than the sum of its proper divisors (10888035584).

21776071162 is a wasteful number, since it uses less digits than its factorization.

21776071162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10888035583.

The product of its (nonzero) digits is 49392, while the sum is 40.

The spelling of 21776071162 in words is "twenty-one billion, seven hundred seventy-six million, seventy-one thousand, one hundred sixty-two".