5156777281 has 4 divisors (see below), whose sum is σ = 5158294272. Its totient is φ = 5155260292.

The previous prime is 5156777257. The next prime is 5156777287. The reversal of 5156777281 is 1827776515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5156777281 - 2¹³ = 5156769089 is a prime.

It is a super-2 number, since 2×5156777281² = 53184703851675505922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5156777287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753385 + ... + 760198.

It is an arithmetic number, because the mean of its divisors is an integer number (1289573568).

Almost surely, 2^5156777281 is an apocalyptic number.

It is an amenable number.

5156777281 is a deficient number, since it is larger than the sum of its proper divisors (1516991).

5156777281 is a wasteful number, since it uses less digits than its factorization.

5156777281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516990.

The product of its digits is 823200, while the sum is 49.

The square root of 5156777281 is about 71810.7045014878. The cubic root of 5156777281 is about 1727.6646941400.

The spelling of 5156777281 in words is "five billion, one hundred fifty-six million, seven hundred seventy-seven thousand, two hundred eighty-one".