291245878345 has 16 divisors (see below), whose sum is σ = 350837241408. Its totient is φ = 232103623360.

The previous prime is 291245878337. The next prime is 291245878349. The reversal of 291245878345 is 543878542192.

It is not a de Polignac number, because 291245878345 - 2³ = 291245878337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 291245878345.

It is not an unprimeable number, because it can be changed into a prime (291245878349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1260942 + ... + 1473928.

It is an arithmetic number, because the mean of its divisors is an integer number (21927327588).

Almost surely, 2^291245878345 is an apocalyptic number.

It is an amenable number.

291245878345 is a deficient number, since it is larger than the sum of its proper divisors (59591363063).

291245878345 is a wasteful number, since it uses less digits than its factorization.

291245878345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214040.

The product of its digits is 19353600, while the sum is 58.

The spelling of 291245878345 in words is "two hundred ninety-one billion, two hundred forty-five million, eight hundred seventy-eight thousand, three hundred forty-five".