85386405074 has 4 divisors (see below), whose sum is σ = 128079607614. Its totient is φ = 42693202536.

The previous prime is 85386405073. The next prime is 85386405079. The reversal of 85386405074 is 47050468358.

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., 43412639449 + 41973765625 = 208357^2 + 204875^2 .

It is a super-2 number, since 2×85386405074² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85386405073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21346601267 + ... + 21346601270.

Almost surely, 2^85386405074 is an apocalyptic number.

85386405074 is a deficient number, since it is larger than the sum of its proper divisors (42693202540).

85386405074 is a wasteful number, since it uses less digits than its factorization.

85386405074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42693202539.

The product of its (nonzero) digits is 3225600, while the sum is 50.

The spelling of 85386405074 in words is "eighty-five billion, three hundred eighty-six million, four hundred five thousand, seventy-four".