85778414837 has 4 divisors (see below), whose sum is σ = 85881887820. Its totient is φ = 85674941856.

The previous prime is 85778414797. The next prime is 85778414849. The reversal of 85778414837 is 73841487758.

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 58932903121 + 26845511716 = 242761^2 + 163846^2 .

It is a cyclic number.

It is not a de Polignac number, because 85778414837 - 2⁶ = 85778414773 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85778414837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85778414857) 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 3 ways as a sum of consecutive naturals, for example, 51735248 + ... + 51736905.

It is an arithmetic number, because the mean of its divisors is an integer number (21470471955).

Almost surely, 2^85778414837 is an apocalyptic number.

It is an amenable number.

85778414837 is a deficient number, since it is larger than the sum of its proper divisors (103472983).

85778414837 is a wasteful number, since it uses less digits than its factorization.

85778414837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103472982.

The product of its digits is 42147840, while the sum is 62.

The spelling of 85778414837 in words is "eighty-five billion, seven hundred seventy-eight million, four hundred fourteen thousand, eight hundred thirty-seven".