51900357205493 has 2 divisors, whose sum is σ = 51900357205494. Its totient is φ = 51900357205492.

The previous prime is 51900357205409. The next prime is 51900357205519. The reversal of 51900357205493 is 39450275300915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42731100831409 + 9169256374084 = 6536903^2 + 3028078^2 .

It is a cyclic number.

It is not a de Polignac number, because 51900357205493 - 2¹⁰ = 51900357204469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51900357205093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25950178602746 + 25950178602747.

It is an arithmetic number, because the mean of its divisors is an integer number (25950178602747).

Almost surely, 2^{51900357205493} is an apocalyptic number.

It is an amenable number.

51900357205493 is a deficient number, since it is larger than the sum of its proper divisors (1).

51900357205493 is an equidigital number, since it uses as much as digits as its factorization.

51900357205493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103000, while the sum is 53.

The spelling of 51900357205493 in words is "fifty-one trillion, nine hundred billion, three hundred fifty-seven million, two hundred five thousand, four hundred ninety-three".