84726455917 has 4 divisors (see below), whose sum is σ = 84740187420. Its totient is φ = 84712724416.

The previous prime is 84726455893. The next prime is 84726455927. The reversal of 84726455917 is 71955462748.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16623202761 + 68103253156 = 128931^2 + 260966^2 .

It is a cyclic number.

It is not a de Polignac number, because 84726455917 - 2²³ = 84718067309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84726455927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6856492 + ... + 6868837.

It is an arithmetic number, because the mean of its divisors is an integer number (21185046855).

Almost surely, 2^84726455917 is an apocalyptic number.

It is an amenable number.

84726455917 is a deficient number, since it is larger than the sum of its proper divisors (13731503).

84726455917 is a wasteful number, since it uses less digits than its factorization.

84726455917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13731502.

The product of its digits is 16934400, while the sum is 58.

The spelling of 84726455917 in words is "eighty-four billion, seven hundred twenty-six million, four hundred fifty-five thousand, nine hundred seventeen".