53647954981 has 2 divisors, whose sum is σ = 53647954982. Its totient is φ = 53647954980.

The previous prime is 53647954897. The next prime is 53647955017. The reversal of 53647954981 is 18945974635.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52189402500 + 1458552481 = 228450^2 + 38191^2 .

It is a cyclic number.

It is not a de Polignac number, because 53647954981 - 2¹⁵ = 53647922213 is a prime.

It is a super-2 number, since 2×53647954981² (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 (53647954081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26823977490 + 26823977491.

It is an arithmetic number, because the mean of its divisors is an integer number (26823977491).

Almost surely, 2^53647954981 is an apocalyptic number.

It is an amenable number.

53647954981 is a deficient number, since it is larger than the sum of its proper divisors (1).

53647954981 is an equidigital number, since it uses as much as digits as its factorization.

53647954981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32659200, while the sum is 61.

The spelling of 53647954981 in words is "fifty-three billion, six hundred forty-seven million, nine hundred fifty-four thousand, nine hundred eighty-one".