133887962449 has 4 divisors (see below), whose sum is σ = 141763724964. Its totient is φ = 126012199936.

The previous prime is 133887962447. The next prime is 133887962459. The reversal of 133887962449 is 944269788331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 944269788331 = 21673 ⋅43568947.

It can be written as a sum of positive squares in 2 ways, for example, as 105846115600 + 28041846849 = 325340^2 + 167457^2 .

It is a cyclic number.

It is not a de Polignac number, because 133887962449 - 2¹ = 133887962447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133887962443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3937881232 + ... + 3937881265.

It is an arithmetic number, because the mean of its divisors is an integer number (35440931241).

Almost surely, 2^133887962449 is an apocalyptic number.

It is an amenable number.

133887962449 is a deficient number, since it is larger than the sum of its proper divisors (7875762515).

133887962449 is an equidigital number, since it uses as much as digits as its factorization.

133887962449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7875762514.

The product of its digits is 62705664, while the sum is 64.

The spelling of 133887962449 in words is "one hundred thirty-three billion, eight hundred eighty-seven million, nine hundred sixty-two thousand, four hundred forty-nine".