311961591287272 has 8 divisors (see below), whose sum is σ = 584927983663650. Its totient is φ = 155980795643632.

The previous prime is 311961591287267. The next prime is 311961591287363. The reversal of 311961591287272 is 272782195169113.

It can be written as a sum of positive squares in only one way, i.e., 192111076251396 + 119850515035876 = 13860414^2 + 10947626^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19497599455447 + ... + 19497599455462.

Almost surely, 2^{311961591287272} is an apocalyptic number.

It is an amenable number.

311961591287272 is a deficient number, since it is larger than the sum of its proper divisors (272966392376378).

311961591287272 is a wasteful number, since it uses less digits than its factorization.

311961591287272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38995198910915 (or 38995198910911 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 64.

The spelling of 311961591287272 in words is "three hundred eleven trillion, nine hundred sixty-one billion, five hundred ninety-one million, two hundred eighty-seven thousand, two hundred seventy-two".