51551155457 has 2 divisors, whose sum is σ = 51551155458. Its totient is φ = 51551155456.

The previous prime is 51551155387. The next prime is 51551155459. The reversal of 51551155457 is 75455115515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44281205761 + 7269949696 = 210431^2 + 85264^2 .

It is a cyclic number.

It is not a de Polignac number, because 51551155457 - 2²⁴ = 51534378241 is a prime.

Together with 51551155459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51551155459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25775577728 + 25775577729.

It is an arithmetic number, because the mean of its divisors is an integer number (25775577729).

Almost surely, 2^51551155457 is an apocalyptic number.

It is an amenable number.

51551155457 is a deficient number, since it is larger than the sum of its proper divisors (1).

51551155457 is an equidigital number, since it uses as much as digits as its factorization.

51551155457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 437500, while the sum is 44.

The spelling of 51551155457 in words is "fifty-one billion, five hundred fifty-one million, one hundred fifty-five thousand, four hundred fifty-seven".