5111051997871 has 8 divisors (see below), whose sum is σ = 5300151537824. Its totient is φ = 4924634721120.

The previous prime is 5111051997869. The next prime is 5111051997881. The reversal of 5111051997871 is 1787991501115.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 5111051997871 - 2¹ = 5111051997869 is a prime.

It is a super-2 number, since 2×5111051997871² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5111051997881) 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, 670561920 + ... + 670569541.

It is an arithmetic number, because the mean of its divisors is an integer number (662518942228).

Almost surely, 2^{5111051997871} is an apocalyptic number.

5111051997871 is a deficient number, since it is larger than the sum of its proper divisors (189099539953).

5111051997871 is a wasteful number, since it uses less digits than its factorization.

5111051997871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341131601.

The product of its (nonzero) digits is 793800, while the sum is 55.

The spelling of 5111051997871 in words is "five trillion, one hundred eleven billion, fifty-one million, nine hundred ninety-seven thousand, eight hundred seventy-one".