83840402641 has 2 divisors, whose sum is σ = 83840402642. Its totient is φ = 83840402640.

The previous prime is 83840402609. The next prime is 83840402651. The reversal of 83840402641 is 14620404838.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69600992400 + 14239410241 = 263820^2 + 119329^2 .

It is a cyclic number.

It is not a de Polignac number, because 83840402641 - 2⁵ = 83840402609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83840402594 and 83840402603.

It is not a weakly prime, because it can be changed into another prime (83840402651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41920201320 + 41920201321.

It is an arithmetic number, because the mean of its divisors is an integer number (41920201321).

Almost surely, 2^83840402641 is an apocalyptic number.

It is an amenable number.

83840402641 is a deficient number, since it is larger than the sum of its proper divisors (1).

83840402641 is an equidigital number, since it uses as much as digits as its factorization.

83840402641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 83840402641 in words is "eighty-three billion, eight hundred forty million, four hundred two thousand, six hundred forty-one".