1669398725913 has 8 divisors (see below), whose sum is σ = 2225870954400. Its totient is φ = 1112929490688.

The previous prime is 1669398725887. The next prime is 1669398725983. The reversal of 1669398725913 is 3195278939661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1669398725913 - 2⁶ = 1669398725849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1669398725983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1663498 + ... + 2471036.

It is an arithmetic number, because the mean of its divisors is an integer number (278233869300).

Almost surely, 2^{1669398725913} is an apocalyptic number.

It is an amenable number.

1669398725913 is a deficient number, since it is larger than the sum of its proper divisors (556472228487).

1669398725913 is an equidigital number, since it uses as much as digits as its factorization.

1669398725913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496631.

The product of its digits is 132269760, while the sum is 69.

The spelling of 1669398725913 in words is "one trillion, six hundred sixty-nine billion, three hundred ninety-eight million, seven hundred twenty-five thousand, nine hundred thirteen".