2291137469865 has 48 divisors (see below), whose sum is σ = 4207139773200. Its totient is φ = 1149451616256.

The previous prime is 2291137469857. The next prime is 2291137469897. The reversal of 2291137469865 is 5689647311922.

2291137469865 is a `hidden beast` number, since 2 + 2 + 91 + 1 + 3 + 7 + 469 + 86 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 9635974569 + 2281501495296 = 98163^2 + 1510464^2 .

It is not a de Polignac number, because 2291137469865 - 2³ = 2291137469857 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 652351 + ... + 2237819.

It is an arithmetic number, because the mean of its divisors is an integer number (87648745275).

Almost surely, 2^{2291137469865} is an apocalyptic number.

It is an amenable number.

2291137469865 is a deficient number, since it is larger than the sum of its proper divisors (1916002303335).

2291137469865 is a wasteful number, since it uses less digits than its factorization.

2291137469865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587386 (or 1587383 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The spelling of 2291137469865 in words is "two trillion, two hundred ninety-one billion, one hundred thirty-seven million, four hundred sixty-nine thousand, eight hundred sixty-five".