54635212781 has 2 divisors, whose sum is σ = 54635212782. Its totient is φ = 54635212780.

The previous prime is 54635212733. The next prime is 54635212813. The reversal of 54635212781 is 18721253645.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39954013225 + 14681199556 = 199885^2 + 121166^2 .

It is a cyclic number.

It is not a de Polignac number, because 54635212781 - 2¹⁴ = 54635196397 is a prime.

It is a super-2 number, since 2×54635212781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54635212381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27317606390 + 27317606391.

It is an arithmetic number, because the mean of its divisors is an integer number (27317606391).

Almost surely, 2^54635212781 is an apocalyptic number.

It is an amenable number.

54635212781 is a deficient number, since it is larger than the sum of its proper divisors (1).

54635212781 is an equidigital number, since it uses as much as digits as its factorization.

54635212781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 44.

The spelling of 54635212781 in words is "fifty-four billion, six hundred thirty-five million, two hundred twelve thousand, seven hundred eighty-one".