85540015394 has 4 divisors (see below), whose sum is σ = 128310023094. Its totient is φ = 42770007696.

The previous prime is 85540015357. The next prime is 85540015397. The reversal of 85540015394 is 49351004558.

It is a happy number.

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., 77036778025 + 8503237369 = 277555^2 + 92213^2 .

It is not an unprimeable number, because it can be changed into a prime (85540015397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21385003847 + ... + 21385003850.

Almost surely, 2^85540015394 is an apocalyptic number.

85540015394 is a deficient number, since it is larger than the sum of its proper divisors (42770007700).

85540015394 is a wasteful number, since it uses less digits than its factorization.

85540015394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42770007699.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 85540015394 in words is "eighty-five billion, five hundred forty million, fifteen thousand, three hundred ninety-four".