1325670651657 has 24 divisors (see below), whose sum is σ = 2089800217440. Its totient is φ = 803104202880.

The previous prime is 1325670651649. The next prime is 1325670651661. The reversal of 1325670651657 is 7561560765231.

1325670651657 is a `hidden beast` number, since 1 + 3 + 2 + 5 + 6 + 70 + 6 + 516 + 57 = 666.

It is not a de Polignac number, because 1325670651657 - 2³ = 1325670651649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1325670650657) 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, 2530807 + ... + 3009372.

It is an arithmetic number, because the mean of its divisors is an integer number (87075009060).

Almost surely, 2^{1325670651657} is an apocalyptic number.

It is an amenable number.

1325670651657 is a deficient number, since it is larger than the sum of its proper divisors (764129565783).

1325670651657 is a wasteful number, since it uses less digits than its factorization.

1325670651657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5542613 (or 5542610 counting only the distinct ones).

The product of its (nonzero) digits is 7938000, while the sum is 54.

The spelling of 1325670651657 in words is "one trillion, three hundred twenty-five billion, six hundred seventy million, six hundred fifty-one thousand, six hundred fifty-seven".