1261139822598 has 8 divisors (see below), whose sum is σ = 2522279645208. Its totient is φ = 420379940864.

The previous prime is 1261139822561. The next prime is 1261139822611. The reversal of 1261139822598 is 8952289311621.

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

1261139822598 is an admirable number.

It is a super-2 number, since 2×1261139822598² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105094985211 + ... + 105094985222.

It is an arithmetic number, because the mean of its divisors is an integer number (315284955651).

Almost surely, 2^{1261139822598} is an apocalyptic number.

1261139822598 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261139822598 is a wasteful number, since it uses less digits than its factorization.

1261139822598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210189970438.

The product of its digits is 3732480, while the sum is 57.

The spelling of 1261139822598 in words is "one trillion, two hundred sixty-one billion, one hundred thirty-nine million, eight hundred twenty-two thousand, five hundred ninety-eight".