129503597491 has 8 divisors (see below), whose sum is σ = 130701071600. Its totient is φ = 128306293920.

The previous prime is 129503597479. The next prime is 129503597513. The reversal of 129503597491 is 194795305921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129503597491 - 2¹¹ = 129503595443 is a prime.

It is a super-2 number, since 2×129503597491² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129503597591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1882540 + ... + 1950118.

It is an arithmetic number, because the mean of its divisors is an integer number (16337633950).

Almost surely, 2^129503597491 is an apocalyptic number.

129503597491 is a deficient number, since it is larger than the sum of its proper divisors (1197474109).

129503597491 is a wasteful number, since it uses less digits than its factorization.

129503597491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85269.

The product of its (nonzero) digits is 3061800, while the sum is 55.

The spelling of 129503597491 in words is "one hundred twenty-nine billion, five hundred three million, five hundred ninety-seven thousand, four hundred ninety-one".