995550891681 has 16 divisors (see below), whose sum is σ = 1349217041408. Its totient is φ = 652793558400.

The previous prime is 995550891679. The next prime is 995550891701. The reversal of 995550891681 is 186198055599.

It is not a de Polignac number, because 995550891681 - 2¹ = 995550891679 is a prime.

It is a super-2 number, since 2×995550891681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (995550892681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5020701 + ... + 5215221.

It is an arithmetic number, because the mean of its divisors is an integer number (84326065088).

Almost surely, 2^995550891681 is an apocalyptic number.

It is an amenable number.

995550891681 is a deficient number, since it is larger than the sum of its proper divisors (353666149727).

995550891681 is a wasteful number, since it uses less digits than its factorization.

995550891681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222552.

The product of its (nonzero) digits is 34992000, while the sum is 66.

The spelling of 995550891681 in words is "nine hundred ninety-five billion, five hundred fifty million, eight hundred ninety-one thousand, six hundred eighty-one".