29954893567661 has 4 divisors (see below), whose sum is σ = 29965587927324. Its totient is φ = 29944199208000.

The previous prime is 29954893567637. The next prime is 29954893567663. The reversal of 29954893567661 is 16676539845992.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21412192183561 + 8542701384100 = 4627331^2 + 2922790^2 .

It is a cyclic number.

It is not a de Polignac number, because 29954893567661 - 2¹⁴ = 29954893551277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29954893567663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5347175630 + ... + 5347181231.

It is an arithmetic number, because the mean of its divisors is an integer number (7491396981831).

Almost surely, 2^{29954893567661} is an apocalyptic number.

It is an amenable number.

29954893567661 is a deficient number, since it is larger than the sum of its proper divisors (10694359663).

29954893567661 is a wasteful number, since it uses less digits than its factorization.

29954893567661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10694359662.

The product of its digits is 5290790400, while the sum is 80.

The spelling of 29954893567661 in words is "twenty-nine trillion, nine hundred fifty-four billion, eight hundred ninety-three million, five hundred sixty-seven thousand, six hundred sixty-one".