955640891567 has 4 divisors (see below), whose sum is σ = 956089340856. Its totient is φ = 955192442280.

The previous prime is 955640891549. The next prime is 955640891599. The reversal of 955640891567 is 765198046559.

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

It is a cyclic number.

It is not a de Polignac number, because 955640891567 - 2¹² = 955640887471 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 (955640891467) 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, 224221448 + ... + 224225709.

It is an arithmetic number, because the mean of its divisors is an integer number (239022335214).

Almost surely, 2^955640891567 is an apocalyptic number.

955640891567 is a deficient number, since it is larger than the sum of its proper divisors (448449289).

955640891567 is a wasteful number, since it uses less digits than its factorization.

955640891567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448449288.

The product of its (nonzero) digits is 81648000, while the sum is 65.

The spelling of 955640891567 in words is "nine hundred fifty-five billion, six hundred forty million, eight hundred ninety-one thousand, five hundred sixty-seven".