2191055125504 has 176 divisors, whose sum is σ = 5321340587520. Its totient is φ = 880787865600.

The previous prime is 2191055125499. The next prime is 2191055125513. The reversal of 2191055125504 is 4055215501912.

It is a happy number.

It is a super-3 number, since 3×2191055125504³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13675749 + ... + 13835035.

Almost surely, 2^{2191055125504} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2191055125504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2660670293760).

2191055125504 is an abundant number, since it is smaller than the sum of its proper divisors (3130285462016).

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

2191055125504 is a wasteful number, since it uses less digits than its factorization.

2191055125504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159434 (or 159416 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 40.

The spelling of 2191055125504 in words is "two trillion, one hundred ninety-one billion, fifty-five million, one hundred twenty-five thousand, five hundred four".