134621631491 has 4 divisors (see below), whose sum is σ = 134629404000. Its totient is φ = 134613858984.

The previous prime is 134621631481. The next prime is 134621631509. The reversal of 134621631491 is 194136126431.

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 134621631491 - 2¹⁰ = 134621630467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134621631481) 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, 3860216 + ... + 3894933.

It is an arithmetic number, because the mean of its divisors is an integer number (33657351000).

Almost surely, 2^134621631491 is an apocalyptic number.

134621631491 is a deficient number, since it is larger than the sum of its proper divisors (7772509).

134621631491 is an equidigital number, since it uses as much as digits as its factorization.

134621631491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7772508.

The product of its digits is 93312, while the sum is 41.

The spelling of 134621631491 in words is "one hundred thirty-four billion, six hundred twenty-one million, six hundred thirty-one thousand, four hundred ninety-one".