7481681777745 has 24 divisors (see below), whose sum is σ = 14820855331776. Its totient is φ = 3420197383968.

The previous prime is 7481681777677. The next prime is 7481681777749. The reversal of 7481681777745 is 5477771861847.

7481681777745 is a `hidden beast` number, since 7 + 481 + 6 + 8 + 1 + 7 + 77 + 74 + 5 = 666.

It is not a de Polignac number, because 7481681777745 - 2⁹ = 7481681777233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7481681777749) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11875685047 + ... + 11875685676.

It is an arithmetic number, because the mean of its divisors is an integer number (617535638824).

Almost surely, 2^{7481681777745} is an apocalyptic number.

It is an amenable number.

7481681777745 is a deficient number, since it is larger than the sum of its proper divisors (7339173554031).

7481681777745 is a wasteful number, since it uses less digits than its factorization.

7481681777745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23751370741 (or 23751370738 counting only the distinct ones).

The product of its digits is 516311040, while the sum is 72.

The spelling of 7481681777745 in words is "seven trillion, four hundred eighty-one billion, six hundred eighty-one million, seven hundred seventy-seven thousand, seven hundred forty-five".