85841378949 has 4 divisors (see below), whose sum is σ = 114455171936. Its totient is φ = 57227585964.

The previous prime is 85841378933. The next prime is 85841378957. The reversal of 85841378949 is 94987314858.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 85841378949 - 2⁴ = 85841378933 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 85841378949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85841378989) 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, 14306896489 + ... + 14306896494.

It is an arithmetic number, because the mean of its divisors is an integer number (28613792984).

Almost surely, 2^85841378949 is an apocalyptic number.

It is an amenable number.

85841378949 is a deficient number, since it is larger than the sum of its proper divisors (28613792987).

85841378949 is a wasteful number, since it uses less digits than its factorization.

85841378949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28613792986.

The product of its digits is 69672960, while the sum is 66.

The spelling of 85841378949 in words is "eighty-five billion, eight hundred forty-one million, three hundred seventy-eight thousand, nine hundred forty-nine".