1639003880361 has 16 divisors (see below), whose sum is σ = 2230346361600. Its totient is φ = 1070347545168.

The previous prime is 1639003880357. The next prime is 1639003880429. The reversal of 1639003880361 is 1630883009361.

It is a happy number.

It is not a de Polignac number, because 1639003880361 - 2² = 1639003880357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1639003880361.

It is not an unprimeable number, because it can be changed into a prime (1639003880341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22741251 + ... + 22813208.

It is an arithmetic number, because the mean of its divisors is an integer number (139396647600).

Almost surely, 2^{1639003880361} is an apocalyptic number.

It is an amenable number.

1639003880361 is a deficient number, since it is larger than the sum of its proper divisors (591342481239).

1639003880361 is a wasteful number, since it uses less digits than its factorization.

1639003880361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45554708.

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 1639003880361 in words is "one trillion, six hundred thirty-nine billion, three million, eight hundred eighty thousand, three hundred sixty-one".