19294899240961 has 8 divisors (see below), whose sum is σ = 19472708451240. Its totient is φ = 19117104427008.

The previous prime is 19294899240959. The next prime is 19294899241049. The reversal of 19294899240961 is 16904299849291.

It can be written as a sum of positive squares in 4 ways, for example, as 9613218069361 + 9681681171600 = 3100519^2 + 3111540^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19294899240961 - 2¹ = 19294899240959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19294899240941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 896896 + ... + 6276481.

It is an arithmetic number, because the mean of its divisors is an integer number (2434088556405).

Almost surely, 2^{19294899240961} is an apocalyptic number.

It is an amenable number.

19294899240961 is a deficient number, since it is larger than the sum of its proper divisors (177809210279).

19294899240961 is a wasteful number, since it uses less digits than its factorization.

19294899240961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7198163.

The product of its (nonzero) digits is 181398528, while the sum is 73.

The spelling of 19294899240961 in words is "nineteen trillion, two hundred ninety-four billion, eight hundred ninety-nine million, two hundred forty thousand, nine hundred sixty-one".