51048297749 has 2 divisors, whose sum is σ = 51048297750. Its totient is φ = 51048297748.

The previous prime is 51048297733. The next prime is 51048297779. The reversal of 51048297749 is 94779284015.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44766942724 + 6281355025 = 211582^2 + 79255^2 .

It is a cyclic number.

It is not a de Polignac number, because 51048297749 - 2⁴ = 51048297733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51048297694 and 51048297703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51048297779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25524148874 + 25524148875.

It is an arithmetic number, because the mean of its divisors is an integer number (25524148875).

Almost surely, 2^51048297749 is an apocalyptic number.

It is an amenable number.

51048297749 is a deficient number, since it is larger than the sum of its proper divisors (1).

51048297749 is an equidigital number, since it uses as much as digits as its factorization.

51048297749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 51048297749 in words is "fifty-one billion, forty-eight million, two hundred ninety-seven thousand, seven hundred forty-nine".