51778673563 has 2 divisors, whose sum is σ = 51778673564. Its totient is φ = 51778673562.

The previous prime is 51778673519. The next prime is 51778673567. The reversal of 51778673563 is 36537687715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51778673563 - 2¹³ = 51778665371 is a prime.

It is a super-2 number, since 2×51778673563² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51778673498 and 51778673507.

It is not a weakly prime, because it can be changed into another prime (51778673567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25889336781 + 25889336782.

It is an arithmetic number, because the mean of its divisors is an integer number (25889336782).

Almost surely, 2^51778673563 is an apocalyptic number.

51778673563 is a deficient number, since it is larger than the sum of its proper divisors (1).

51778673563 is an equidigital number, since it uses as much as digits as its factorization.

51778673563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22226400, while the sum is 58.

The spelling of 51778673563 in words is "fifty-one billion, seven hundred seventy-eight million, six hundred seventy-three thousand, five hundred sixty-three".