5251978877 has 2 divisors, whose sum is σ = 5251978878. Its totient is φ = 5251978876.

The previous prime is 5251978819. The next prime is 5251978903. The reversal of 5251978877 is 7788791525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5251321156 + 657721 = 72466^2 + 811^2 .

It is a cyclic number.

It is not a de Polignac number, because 5251978877 - 2⁶ = 5251978813 is a prime.

It is a super-3 number, since 3×5251978877³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5251978577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2625989438 + 2625989439.

It is an arithmetic number, because the mean of its divisors is an integer number (2625989439).

Almost surely, 2^5251978877 is an apocalyptic number.

It is an amenable number.

5251978877 is a deficient number, since it is larger than the sum of its proper divisors (1).

5251978877 is an equidigital number, since it uses as much as digits as its factorization.

5251978877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9878400, while the sum is 59.

The square root of 5251978877 is about 72470.5379930355. The cubic root of 5251978877 is about 1738.2316641927.

The spelling of 5251978877 in words is "five billion, two hundred fifty-one million, nine hundred seventy-eight thousand, eight hundred seventy-seven".