51284926157 has 2 divisors, whose sum is σ = 51284926158. Its totient is φ = 51284926156.

The previous prime is 51284926139. The next prime is 51284926169. The reversal of 51284926157 is 75162948215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28445858281 + 22839067876 = 168659^2 + 151126^2 .

It is a cyclic number.

It is not a de Polignac number, because 51284926157 - 2¹² = 51284922061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51284926757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25642463078 + 25642463079.

It is an arithmetic number, because the mean of its divisors is an integer number (25642463079).

Almost surely, 2^51284926157 is an apocalyptic number.

It is an amenable number.

51284926157 is a deficient number, since it is larger than the sum of its proper divisors (1).

51284926157 is an equidigital number, since it uses as much as digits as its factorization.

51284926157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 50.

The spelling of 51284926157 in words is "fifty-one billion, two hundred eighty-four million, nine hundred twenty-six thousand, one hundred fifty-seven".