113487443661 has 4 divisors (see below), whose sum is σ = 151316591552. Its totient is φ = 75658295772.

The previous prime is 113487443639. The next prime is 113487443689. The reversal of 113487443661 is 166344784311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 113487443661 - 2⁷ = 113487443533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 113487443661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113487443611) 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, 18914573941 + ... + 18914573946.

It is an arithmetic number, because the mean of its divisors is an integer number (37829147888).

Almost surely, 2^113487443661 is an apocalyptic number.

It is an amenable number.

113487443661 is a deficient number, since it is larger than the sum of its proper divisors (37829147891).

113487443661 is an equidigital number, since it uses as much as digits as its factorization.

113487443661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37829147890.

The product of its digits is 1161216, while the sum is 48.

The spelling of 113487443661 in words is "one hundred thirteen billion, four hundred eighty-seven million, four hundred forty-three thousand, six hundred sixty-one".