7821038075445 has 96 divisors (see below), whose sum is σ = 16510690639872. Its totient is φ = 3347118884736.

The previous prime is 7821038075419. The next prime is 7821038075447. The reversal of 7821038075445 is 5445708301287.

7821038075445 is a `hidden beast` number, since 7 + 8 + 2 + 10 + 3 + 80 + 7 + 544 + 5 = 666.

It is not a de Polignac number, because 7821038075445 - 2⁸ = 7821038075189 is a prime.

It is a super-2 number, since 2×7821038075445² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7821038075391 and 7821038075400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7821038075447) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11143617 + ... + 11824646.

It is an arithmetic number, because the mean of its divisors is an integer number (171986360832).

Almost surely, 2^{7821038075445} is an apocalyptic number.

It is an amenable number.

7821038075445 is an abundant number, since it is smaller than the sum of its proper divisors (8689652564427).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7821038075445 is a wasteful number, since it uses less digits than its factorization.

7821038075445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22968351 (or 22968348 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 54.

The spelling of 7821038075445 in words is "seven trillion, eight hundred twenty-one billion, thirty-eight million, seventy-five thousand, four hundred forty-five".