85015253506 has 4 divisors (see below), whose sum is σ = 127522880262. Its totient is φ = 42507626752.

The previous prime is 85015253503. The next prime is 85015253509. The reversal of 85015253506 is 60535251058.

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

It is an interprime number because it is at equal distance from previous prime (85015253503) and next prime (85015253509).

It can be written as a sum of positive squares in only one way, i.e., 56330750281 + 28684503225 = 237341^2 + 169365^2 .

It is not an unprimeable number, because it can be changed into a prime (85015253503) 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, 21253813375 + ... + 21253813378.

Almost surely, 2^85015253506 is an apocalyptic number.

85015253506 is a deficient number, since it is larger than the sum of its proper divisors (42507626756).

85015253506 is a wasteful number, since it uses less digits than its factorization.

85015253506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42507626755.

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 85015253506 in words is "eighty-five billion, fifteen million, two hundred fifty-three thousand, five hundred six".