83613980645 has 8 divisors (see below), whose sum is σ = 108054990456. Its totient is φ = 61745708736.

The previous prime is 83613980627. The next prime is 83613980651. The reversal of 83613980645 is 54608931638.

It can be written as a sum of positive squares in 4 ways, for example, as 3928030276 + 79685950369 = 62674^2 + 282287^2 .

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 83613980645 - 2¹⁶ = 83613915109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 643184402 + ... + 643184531.

It is an arithmetic number, because the mean of its divisors is an integer number (13506873807).

Almost surely, 2^83613980645 is an apocalyptic number.

It is an amenable number.

83613980645 is a deficient number, since it is larger than the sum of its proper divisors (24441009811).

83613980645 is a wasteful number, since it uses less digits than its factorization.

83613980645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286368951.

The product of its (nonzero) digits is 3732480, while the sum is 53.

The spelling of 83613980645 in words is "eighty-three billion, six hundred thirteen million, nine hundred eighty thousand, six hundred forty-five".