971556101913 has 4 divisors (see below), whose sum is σ = 1295408135888. Its totient is φ = 647704067940.

The previous prime is 971556101891. The next prime is 971556101953. The reversal of 971556101913 is 319101655179.

It is a happy number.

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 971556101913 - 2¹³ = 971556093721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (971556101953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161926016983 + ... + 161926016988.

It is an arithmetic number, because the mean of its divisors is an integer number (323852033972).

Almost surely, 2^971556101913 is an apocalyptic number.

It is an amenable number.

971556101913 is a deficient number, since it is larger than the sum of its proper divisors (323852033975).

971556101913 is a wasteful number, since it uses less digits than its factorization.

971556101913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323852033974.

The product of its (nonzero) digits is 255150, while the sum is 48.

The spelling of 971556101913 in words is "nine hundred seventy-one billion, five hundred fifty-six million, one hundred one thousand, nine hundred thirteen".