1408072801981 has 2 divisors, whose sum is σ = 1408072801982. Its totient is φ = 1408072801980.

The previous prime is 1408072801969. The next prime is 1408072802039. The reversal of 1408072801981 is 1891082708041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1128513159225 + 279559642756 = 1062315^2 + 528734^2 .

It is an emirp because it is prime and its reverse (1891082708041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1408072801981 is a prime.

It is a super-2 number, since 2×1408072801981² (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 (1408072801951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 704036400990 + 704036400991.

It is an arithmetic number, because the mean of its divisors is an integer number (704036400991).

Almost surely, 2^{1408072801981} is an apocalyptic number.

It is an amenable number.

1408072801981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1408072801981 is an equidigital number, since it uses as much as digits as its factorization.

1408072801981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 258048, while the sum is 49.

The spelling of 1408072801981 in words is "one trillion, four hundred eight billion, seventy-two million, eight hundred one thousand, nine hundred eighty-one".