51425742157 has 2 divisors, whose sum is σ = 51425742158. Its totient is φ = 51425742156.

The previous prime is 51425742139. The next prime is 51425742187. The reversal of 51425742157 is 75124752415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41333329636 + 10092412521 = 203306^2 + 100461^2 .

It is a cyclic number.

It is not a de Polignac number, because 51425742157 - 2¹⁹ = 51425217869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51425742187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25712871078 + 25712871079.

It is an arithmetic number, because the mean of its divisors is an integer number (25712871079).

Almost surely, 2^51425742157 is an apocalyptic number.

It is an amenable number.

51425742157 is a deficient number, since it is larger than the sum of its proper divisors (1).

51425742157 is an equidigital number, since it uses as much as digits as its factorization.

51425742157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 392000, while the sum is 43.

The spelling of 51425742157 in words is "fifty-one billion, four hundred twenty-five million, seven hundred forty-two thousand, one hundred fifty-seven".