291400068135 has 32 divisors (see below), whose sum is σ = 521031087360. Its totient is φ = 137838905600.

The previous prime is 291400068101. The next prime is 291400068139. The reversal of 291400068135 is 531860004192.

It is not a de Polignac number, because 291400068135 - 2¹⁹ = 291399543847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 291400068093 and 291400068102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291400068139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21530565 + ... + 21544094.

It is an arithmetic number, because the mean of its divisors is an integer number (16282221480).

Almost surely, 2^291400068135 is an apocalyptic number.

291400068135 is a deficient number, since it is larger than the sum of its proper divisors (229631019225).

291400068135 is a wasteful number, since it uses less digits than its factorization.

291400068135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43074719.

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 291400068135 in words is "two hundred ninety-one billion, four hundred million, sixty-eight thousand, one hundred thirty-five".