51953779489 has 2 divisors, whose sum is σ = 51953779490. Its totient is φ = 51953779488.

The previous prime is 51953779481. The next prime is 51953779513. The reversal of 51953779489 is 98497735915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51725769489 + 228010000 = 227433^2 + 15100^2 .

It is a cyclic number.

It is not a de Polignac number, because 51953779489 - 2³ = 51953779481 is a prime.

It is a super-2 number, since 2×51953779489² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51953779481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25976889744 + 25976889745.

It is an arithmetic number, because the mean of its divisors is an integer number (25976889745).

Almost surely, 2^51953779489 is an apocalyptic number.

It is an amenable number.

51953779489 is a deficient number, since it is larger than the sum of its proper divisors (1).

51953779489 is an equidigital number, since it uses as much as digits as its factorization.

51953779489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85730400, while the sum is 67.

The spelling of 51953779489 in words is "fifty-one billion, nine hundred fifty-three million, seven hundred seventy-nine thousand, four hundred eighty-nine".