84385940791455 has 96 divisors (see below), whose sum is σ = 151240658429952. Its totient is φ = 43480983110400.

The previous prime is 84385940791417. The next prime is 84385940791457. The reversal of 84385940791455 is 55419704958348.

84385940791455 is a `hidden beast` number, since 8 + 4 + 3 + 85 + 9 + 4 + 0 + 7 + 91 + 455 = 666.

It is not a de Polignac number, because 84385940791455 - 2²⁰ = 84385939742879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84385940791457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8168220640 + ... + 8168230970.

It is an arithmetic number, because the mean of its divisors is an integer number (1575423525312).

Almost surely, 2^{84385940791455} is an apocalyptic number.

84385940791455 is a deficient number, since it is larger than the sum of its proper divisors (66854717638497).

84385940791455 is a wasteful number, since it uses less digits than its factorization.

84385940791455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19629 (or 19626 counting only the distinct ones).

The product of its (nonzero) digits is 870912000, while the sum is 72.

The spelling of 84385940791455 in words is "eighty-four trillion, three hundred eighty-five billion, nine hundred forty million, seven hundred ninety-one thousand, four hundred fifty-five".