997555201685 has 8 divisors (see below), whose sum is σ = 1368075705216. Its totient is φ = 684037852560.

The previous prime is 997555201679. The next prime is 997555201691. The reversal of 997555201685 is 586102555799.

It is an interprime number because it is at equal distance from previous prime (997555201679) and next prime (997555201691).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 997555201685 - 2¹⁴ = 997555185301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14250788561 + ... + 14250788630.

It is an arithmetic number, because the mean of its divisors is an integer number (171009463152).

Almost surely, 2^997555201685 is an apocalyptic number.

It is an amenable number.

997555201685 is a deficient number, since it is larger than the sum of its proper divisors (370520503531).

997555201685 is a wasteful number, since it uses less digits than its factorization.

997555201685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28501577203.

The product of its (nonzero) digits is 34020000, while the sum is 62.

The spelling of 997555201685 in words is "nine hundred ninety-seven billion, five hundred fifty-five million, two hundred one thousand, six hundred eighty-five".