1639394025641 has 8 divisors (see below), whose sum is σ = 1653406280064. Its totient is φ = 1625404465360.

The previous prime is 1639394025637. The next prime is 1639394025701. The reversal of 1639394025641 is 1465204939361.

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

It is a cyclic number.

It is not a de Polignac number, because 1639394025641 - 2² = 1639394025637 is a prime.

It is a super-2 number, since 2×1639394025641² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1639394025631) 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, 5528426 + ... + 5817411.

It is an arithmetic number, because the mean of its divisors is an integer number (206675785008).

Almost surely, 2^{1639394025641} is an apocalyptic number.

It is an amenable number.

1639394025641 is a deficient number, since it is larger than the sum of its proper divisors (14012254423).

1639394025641 is a wasteful number, since it uses less digits than its factorization.

1639394025641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11347071.

The product of its (nonzero) digits is 4199040, while the sum is 53.

The spelling of 1639394025641 in words is "one trillion, six hundred thirty-nine billion, three hundred ninety-four million, twenty-five thousand, six hundred forty-one".