7481988782081 has 4 divisors (see below), whose sum is σ = 8162169580464. Its totient is φ = 6801807983700.

The previous prime is 7481988782069. The next prime is 7481988782083. The reversal of 7481988782081 is 1802878891847.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7481988782081 - 2³⁸ = 7207110875137 is a prime.

It is a super-2 number, since 2×7481988782081² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7481988781996 and 7481988782014.

It is not an unprimeable number, because it can be changed into a prime (7481988782083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340090399175 + ... + 340090399196.

It is an arithmetic number, because the mean of its divisors is an integer number (2040542395116).

Almost surely, 2^{7481988782081} is an apocalyptic number.

It is an amenable number.

7481988782081 is a deficient number, since it is larger than the sum of its proper divisors (680180798383).

7481988782081 is a wasteful number, since it uses less digits than its factorization.

7481988782081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680180798382.

The product of its (nonzero) digits is 115605504, while the sum is 71.

The spelling of 7481988782081 in words is "seven trillion, four hundred eighty-one billion, nine hundred eighty-eight million, seven hundred eighty-two thousand, eighty-one".