1463948471981 has 2 divisors, whose sum is σ = 1463948471982. Its totient is φ = 1463948471980.

The previous prime is 1463948471957. The next prime is 1463948472031. The reversal of 1463948471981 is 1891748493641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1199890206025 + 264058265956 = 1095395^2 + 513866^2 .

It is an emirp because it is prime and its reverse (1891748493641) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1463948471981 - 2²⁶ = 1463881363117 is a prime.

It is a super-2 number, since 2×1463948471981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1463948471081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 731974235990 + 731974235991.

It is an arithmetic number, because the mean of its divisors is an integer number (731974235991).

Almost surely, 2^{1463948471981} is an apocalyptic number.

It is an amenable number.

1463948471981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1463948471981 is an equidigital number, since it uses as much as digits as its factorization.

1463948471981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41803776, while the sum is 65.

The spelling of 1463948471981 in words is "one trillion, four hundred sixty-three billion, nine hundred forty-eight million, four hundred seventy-one thousand, nine hundred eighty-one".