84757775761 has 8 divisors (see below), whose sum is σ = 85045673960. Its totient is φ = 84470093568.

The previous prime is 84757775749. The next prime is 84757775783. The reversal of 84757775761 is 16757775748.

It can be written as a sum of positive squares in 4 ways, for example, as 1269140625 + 83488635136 = 35625^2 + 288944^2 .

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 84757775761 - 2⁷ = 84757775633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84757775693 and 84757775702.

It is not an unprimeable number, because it can be changed into a prime (84757775701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 752455 + ... + 857731.

It is an arithmetic number, because the mean of its divisors is an integer number (10630709245).

Almost surely, 2^84757775761 is an apocalyptic number.

It is an amenable number.

84757775761 is a deficient number, since it is larger than the sum of its proper divisors (287898199).

84757775761 is a wasteful number, since it uses less digits than its factorization.

84757775761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108003.

The product of its digits is 80673600, while the sum is 64.

The spelling of 84757775761 in words is "eighty-four billion, seven hundred fifty-seven million, seven hundred seventy-five thousand, seven hundred sixty-one".