51612767513 has 2 divisors, whose sum is σ = 51612767514. Its totient is φ = 51612767512.

The previous prime is 51612767489. The next prime is 51612767527. The reversal of 51612767513 is 31576721615.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47378922889 + 4233844624 = 217667^2 + 65068^2 .

It is a cyclic number.

It is not a de Polignac number, because 51612767513 - 2¹⁰ = 51612766489 is a prime.

It is not a weakly prime, because it can be changed into another prime (51612763513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25806383756 + 25806383757.

It is an arithmetic number, because the mean of its divisors is an integer number (25806383757).

Almost surely, 2^51612767513 is an apocalyptic number.

It is an amenable number.

51612767513 is a deficient number, since it is larger than the sum of its proper divisors (1).

51612767513 is an equidigital number, since it uses as much as digits as its factorization.

51612767513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264600, while the sum is 44.

The spelling of 51612767513 in words is "fifty-one billion, six hundred twelve million, seven hundred sixty-seven thousand, five hundred thirteen".