51377749487 has 2 divisors, whose sum is σ = 51377749488. Its totient is φ = 51377749486.

The previous prime is 51377749441. The next prime is 51377749499. The reversal of 51377749487 is 78494777315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51377749487 - 2²⁰ = 51376700911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51377746487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25688874743 + 25688874744.

It is an arithmetic number, because the mean of its divisors is an integer number (25688874744).

Almost surely, 2^51377749487 is an apocalyptic number.

51377749487 is a deficient number, since it is larger than the sum of its proper divisors (1).

51377749487 is an equidigital number, since it uses as much as digits as its factorization.

51377749487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41489280, while the sum is 62.

The spelling of 51377749487 in words is "fifty-one billion, three hundred seventy-seven million, seven hundred forty-nine thousand, four hundred eighty-seven".