84953868761 has 2 divisors, whose sum is σ = 84953868762. Its totient is φ = 84953868760.

The previous prime is 84953868709. The next prime is 84953868799. The reversal of 84953868761 is 16786835948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83084603536 + 1869265225 = 288244^2 + 43235^2 .

It is a cyclic number.

It is not a de Polignac number, because 84953868761 - 2²² = 84949674457 is a prime.

It is a super-2 number, since 2×84953868761² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (84953868061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42476934380 + 42476934381.

It is an arithmetic number, because the mean of its divisors is an integer number (42476934381).

Almost surely, 2^84953868761 is an apocalyptic number.

It is an amenable number.

84953868761 is a deficient number, since it is larger than the sum of its proper divisors (1).

84953868761 is an equidigital number, since it uses as much as digits as its factorization.

84953868761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69672960, while the sum is 65.

The spelling of 84953868761 in words is "eighty-four billion, nine hundred fifty-three million, eight hundred sixty-eight thousand, seven hundred sixty-one".