131297533736 has 8 divisors (see below), whose sum is σ = 246182875770. Its totient is φ = 65648766864.

The previous prime is 131297533691. The next prime is 131297533739. The reversal of 131297533736 is 637335792131.

It can be written as a sum of positive squares in only one way, i.e., 131297522500 + 11236 = 362350^2 + 106^2 .

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

It is not an unprimeable number, because it can be changed into a prime (131297533739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8206095851 + ... + 8206095866.

Almost surely, 2^131297533736 is an apocalyptic number.

It is an amenable number.

131297533736 is a deficient number, since it is larger than the sum of its proper divisors (114885342034).

131297533736 is a wasteful number, since it uses less digits than its factorization.

131297533736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16412191723 (or 16412191719 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 50.

The spelling of 131297533736 in words is "one hundred thirty-one billion, two hundred ninety-seven million, five hundred thirty-three thousand, seven hundred thirty-six".