5156945933881 has 27 divisors (see below), whose sum is σ = 6115217666733. Its totient is φ = 4336130111040.

The previous prime is 5156945933863. The next prime is 5156945933891. The reversal of 5156945933881 is 1883395496515.

The square root of 5156945933881 is 2270891.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 227142794025 + 4929803139856 = 476595^2 + 2220316^2 .

It is not a de Polignac number, because 5156945933881 - 2¹⁹ = 5156945409593 is a prime.

It is a super-2 number, since 2×5156945933881² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5156945933831) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 842497501 + ... + 842503621.

Almost surely, 2^{5156945933881} is an apocalyptic number.

5156945933881 is the 2270891-st square number.

5156945933881 is the 1135446-th centered octagonal number.

It is an amenable number.

5156945933881 is a deficient number, since it is larger than the sum of its proper divisors (958271732852).

5156945933881 is an frugal number, since it uses more digits than its factorization.

5156945933881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12362 (or 6181 counting only the distinct ones).

The product of its digits is 139968000, while the sum is 67.

The spelling of 5156945933881 in words is "five trillion, one hundred fifty-six billion, nine hundred forty-five million, nine hundred thirty-three thousand, eight hundred eighty-one".