83220928641 has 6 divisors (see below), whose sum is σ = 120208008050. Its totient is φ = 55480619088.

The previous prime is 83220928591. The next prime is 83220928657. The reversal of 83220928641 is 14682902238.

83220928641 is a `hidden beast` number, since 8 + 322 + 0 + 9 + 286 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 61155311616 + 22065617025 = 247296^2 + 148545^2 .

It is not a de Polignac number, because 83220928641 - 2¹⁸ = 83220666497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83220928741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4623384916 + ... + 4623384933.

Almost surely, 2^83220928641 is an apocalyptic number.

It is an amenable number.

83220928641 is a deficient number, since it is larger than the sum of its proper divisors (36987079409).

83220928641 is a wasteful number, since it uses less digits than its factorization.

83220928641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9246769855 (or 9246769852 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 83220928641 in words is "eighty-three billion, two hundred twenty million, nine hundred twenty-eight thousand, six hundred forty-one".