51151657009 has 2 divisors, whose sum is σ = 51151657010. Its totient is φ = 51151657008.

The previous prime is 51151656979. The next prime is 51151657027. The reversal of 51151657009 is 90075615115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50848897009 + 302760000 = 225497^2 + 17400^2 .

It is a cyclic number.

It is not a de Polignac number, because 51151657009 - 2⁵ = 51151656977 is a prime.

It is not a weakly prime, because it can be changed into another prime (51151657049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25575828504 + 25575828505.

It is an arithmetic number, because the mean of its divisors is an integer number (25575828505).

Almost surely, 2^51151657009 is an apocalyptic number.

It is an amenable number.

51151657009 is a deficient number, since it is larger than the sum of its proper divisors (1).

51151657009 is an equidigital number, since it uses as much as digits as its factorization.

51151657009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47250, while the sum is 40.

The spelling of 51151657009 in words is "fifty-one billion, one hundred fifty-one million, six hundred fifty-seven thousand, nine".