51051501720077 has 2 divisors, whose sum is σ = 51051501720078. Its totient is φ = 51051501720076.

The previous prime is 51051501719989. The next prime is 51051501720103. The reversal of 51051501720077 is 77002710515015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46821462149641 + 4230039570436 = 6842621^2 + 2056706^2 .

It is a cyclic number.

It is not a de Polignac number, because 51051501720077 - 2²⁸ = 51051233284621 is a prime.

It is a super-3 number, since 3×51051501720077³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51051501720977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25525750860038 + 25525750860039.

It is an arithmetic number, because the mean of its divisors is an integer number (25525750860039).

Almost surely, 2^{51051501720077} is an apocalyptic number.

It is an amenable number.

51051501720077 is a deficient number, since it is larger than the sum of its proper divisors (1).

51051501720077 is an equidigital number, since it uses as much as digits as its factorization.

51051501720077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85750, while the sum is 41.

The spelling of 51051501720077 in words is "fifty-one trillion, fifty-one billion, five hundred one million, seven hundred twenty thousand, seventy-seven".