5111051997870 has 1296 divisors, whose sum is σ = 18098151336720. Its totient is φ = 994511831040.

The previous prime is 5111051997869. The next prime is 5111051997881. The reversal of 5111051997870 is 787991501115.

5111051997870 is a `hidden beast` number, since 5 + 1 + 110 + 519 + 9 + 7 + 8 + 7 + 0 = 666.

It is a harmonic number, since the harmonic mean of its divisors is an integer.

It is a super-2 number, since 2×5111051997870² (a number of 26 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 647 ways as a sum of consecutive naturals, for example, 52691257662 + ... + 52691257758.

It is an arithmetic number, because the mean of its divisors is an integer number (13964622945).

Almost surely, 2^{5111051997870} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5111051997870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9049075668360).

5111051997870 is an abundant number, since it is smaller than the sum of its proper divisors (12987099338850).

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

5111051997870 is a wasteful number, since it uses less digits than its factorization.

5111051997870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 793800, while the sum is 54.

The spelling of 5111051997870 in words is "five trillion, one hundred eleven billion, fifty-one million, nine hundred ninety-seven thousand, eight hundred seventy".