22077155642 has 4 divisors (see below), whose sum is σ = 33115733466. Its totient is φ = 11038577820.

The previous prime is 22077155623. The next prime is 22077155647. The reversal of 22077155642 is 24655177022.

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., 14018323201 + 8058832441 = 118399^2 + 89771^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22077155642.

It is not an unprimeable number, because it can be changed into a prime (22077155647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5519288909 + ... + 5519288912.

Almost surely, 2^22077155642 is an apocalyptic number.

22077155642 is a deficient number, since it is larger than the sum of its proper divisors (11038577824).

22077155642 is a wasteful number, since it uses less digits than its factorization.

22077155642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11038577823.

The product of its (nonzero) digits is 235200, while the sum is 41.

The spelling of 22077155642 in words is "twenty-two billion, seventy-seven million, one hundred fifty-five thousand, six hundred forty-two".