85838756477378 has 4 divisors (see below), whose sum is σ = 128758134716070. Its totient is φ = 42919378238688.

The previous prime is 85838756477333. The next prime is 85838756477381. The reversal of 85838756477378 is 87377465783858.

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

It can be written as a sum of positive squares in only one way, i.e., 76505163238729 + 9333593238649 = 8746723^2 + 3055093^2 .

It is a super-2 number, since 2×85838756477378² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85838756477378.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21459689119343 + ... + 21459689119346.

Almost surely, 2^{85838756477378} is an apocalyptic number.

85838756477378 is a deficient number, since it is larger than the sum of its proper divisors (42919378238692).

85838756477378 is a wasteful number, since it uses less digits than its factorization.

85838756477378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42919378238691.

The product of its digits is 53106278400, while the sum is 86.

The spelling of 85838756477378 in words is "eighty-five trillion, eight hundred thirty-eight billion, seven hundred fifty-six million, four hundred seventy-seven thousand, three hundred seventy-eight".