1649860398573 has 16 divisors (see below), whose sum is σ = 2201834208576. Its totient is φ = 1098896935680.

The previous prime is 1649860398553. The next prime is 1649860398617. The reversal of 1649860398573 is 3758930689461.

It is not a de Polignac number, because 1649860398573 - 2²⁰ = 1649859349997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1649860398498 and 1649860398507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649860398503) 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, 76652053 + ... + 76673573.

It is an arithmetic number, because the mean of its divisors is an integer number (137614638036).

Almost surely, 2^{1649860398573} is an apocalyptic number.

It is an amenable number.

1649860398573 is a deficient number, since it is larger than the sum of its proper divisors (551973810003).

1649860398573 is a wasteful number, since it uses less digits than its factorization.

1649860398573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43804.

The product of its (nonzero) digits is 235146240, while the sum is 69.

The spelling of 1649860398573 in words is "one trillion, six hundred forty-nine billion, eight hundred sixty million, three hundred ninety-eight thousand, five hundred seventy-three".