84017405761 has 2 divisors, whose sum is σ = 84017405762. Its totient is φ = 84017405760.

The previous prime is 84017405743. The next prime is 84017405809. The reversal of 84017405761 is 16750471048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77426401536 + 6591004225 = 278256^2 + 81185^2 .

It is a cyclic number.

It is not a de Polignac number, because 84017405761 - 2²³ = 84009017153 is a prime.

It is not a weakly prime, because it can be changed into another prime (84017405711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42008702880 + 42008702881.

It is an arithmetic number, because the mean of its divisors is an integer number (42008702881).

Almost surely, 2^84017405761 is an apocalyptic number.

It is an amenable number.

84017405761 is a deficient number, since it is larger than the sum of its proper divisors (1).

84017405761 is an equidigital number, since it uses as much as digits as its factorization.

84017405761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 188160, while the sum is 43.

The spelling of 84017405761 in words is "eighty-four billion, seventeen million, four hundred five thousand, seven hundred sixty-one".