85778436373 has 8 divisors (see below), whose sum is σ = 98034333440. Its totient is φ = 73522998000.

The previous prime is 85778436343. The next prime is 85778436389. The reversal of 85778436373 is 37363487758.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85778436373 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 (85778436343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520963 + ... + 665551.

It is an arithmetic number, because the mean of its divisors is an integer number (12254291680).

Almost surely, 2^85778436373 is an apocalyptic number.

It is an amenable number.

85778436373 is a deficient number, since it is larger than the sum of its proper divisors (12255897067).

85778436373 is a wasteful number, since it uses less digits than its factorization.

85778436373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229347.

The product of its digits is 71124480, while the sum is 61.

The spelling of 85778436373 in words is "eighty-five billion, seven hundred seventy-eight million, four hundred thirty-six thousand, three hundred seventy-three".