1271179155798 has 16 divisors (see below), whose sum is σ = 2824842568560. Its totient is φ = 423726385248.

The previous prime is 1271179155791. The next prime is 1271179155811. The reversal of 1271179155798 is 8975519711721.

1271179155798 is a `hidden beast` number, since 1 + 2 + 7 + 1 + 1 + 79 + 1 + 557 + 9 + 8 = 666.

It is a super-4 number, since 4×1271179155798⁴ (a number of 50 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271179155791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11770177315 + ... + 11770177422.

It is an arithmetic number, because the mean of its divisors is an integer number (176552660535).

Almost surely, 2^{1271179155798} is an apocalyptic number.

1271179155798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1271179155798 is an abundant number, since it is smaller than the sum of its proper divisors (1553663412762).

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

1271179155798 is a wasteful number, since it uses less digits than its factorization.

1271179155798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23540354748 (or 23540354742 counting only the distinct ones).

The product of its digits is 11113200, while the sum is 63.

The spelling of 1271179155798 in words is "one trillion, two hundred seventy-one billion, one hundred seventy-nine million, one hundred fifty-five thousand, seven hundred ninety-eight".