291130640134 has 4 divisors (see below), whose sum is σ = 436695960204. Its totient is φ = 145565320066.

The previous prime is 291130640071. The next prime is 291130640179. The reversal of 291130640134 is 431046031192.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×291130640134² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 291130640134.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 72782660032 + ... + 72782660035.

It is an arithmetic number, because the mean of its divisors is an integer number (109173990051).

Almost surely, 2^291130640134 is an apocalyptic number.

291130640134 is a deficient number, since it is larger than the sum of its proper divisors (145565320070).

291130640134 is a wasteful number, since it uses less digits than its factorization.

291130640134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145565320069.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 291130640134 in words is "two hundred ninety-one billion, one hundred thirty million, six hundred forty thousand, one hundred thirty-four".