134218538491 has 2 divisors, whose sum is σ = 134218538492. Its totient is φ = 134218538490.

The previous prime is 134218538429. The next prime is 134218538507. The reversal of 134218538491 is 194835812431.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 134218538491 - 2¹⁷ = 134218407419 is a prime.

It is not a weakly prime, because it can be changed into another prime (134218538411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67109269245 + 67109269246.

It is an arithmetic number, because the mean of its divisors is an integer number (67109269246).

Almost surely, 2^134218538491 is an apocalyptic number.

134218538491 is a deficient number, since it is larger than the sum of its proper divisors (1).

134218538491 is an equidigital number, since it uses as much as digits as its factorization.

134218538491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 49.

The spelling of 134218538491 in words is "one hundred thirty-four billion, two hundred eighteen million, five hundred thirty-eight thousand, four hundred ninety-one".