85085615513551 has 4 divisors (see below), whose sum is σ = 85270183009704. Its totient is φ = 84901048017400.

The previous prime is 85085615513537. The next prime is 85085615513653. The reversal of 85085615513551 is 15531551658058.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 85085615513551 - 2⁹ = 85085615513039 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 (85085615513051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92283747385 + ... + 92283748306.

It is an arithmetic number, because the mean of its divisors is an integer number (21317545752426).

Almost surely, 2^{85085615513551} is an apocalyptic number.

85085615513551 is a deficient number, since it is larger than the sum of its proper divisors (184567496153).

85085615513551 is a wasteful number, since it uses less digits than its factorization.

85085615513551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184567496152.

The product of its (nonzero) digits is 18000000, while the sum is 58.

The spelling of 85085615513551 in words is "eighty-five trillion, eighty-five billion, six hundred fifteen million, five hundred thirteen thousand, five hundred fifty-one".