7908905745563 has 24 divisors (see below), whose sum is σ = 8490028512000. Its totient is φ = 7365276684288.

The previous prime is 7908905745553. The next prime is 7908905745569. The reversal of 7908905745563 is 3655475098097.

It is not a de Polignac number, because 7908905745563 - 2⁴² = 3510859234459 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7908905745493 and 7908905745502.

It is not an unprimeable number, because it can be changed into a prime (7908905745569) 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, 134500973 + ... + 134559761.

It is an arithmetic number, because the mean of its divisors is an integer number (353751188000).

Almost surely, 2^{7908905745563} is an apocalyptic number.

7908905745563 is a deficient number, since it is larger than the sum of its proper divisors (581122766437).

7908905745563 is a wasteful number, since it uses less digits than its factorization.

7908905745563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63719 (or 63702 counting only the distinct ones).

The product of its (nonzero) digits is 285768000, while the sum is 68.

The spelling of 7908905745563 in words is "seven trillion, nine hundred eight billion, nine hundred five million, seven hundred forty-five thousand, five hundred sixty-three".