997677589086 has 128 divisors (see below), whose sum is σ = 2435987865600. Its totient is φ = 301262496480.

The previous prime is 997677589061. The next prime is 997677589091. The reversal of 997677589086 is 680985776799.

It is a junction number, because it is equal to n+sod(n) for n = 997677588996 and 997677589014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 120038871 + ... + 120047181.

It is an arithmetic number, because the mean of its divisors is an integer number (19031155200).

Almost surely, 2^997677589086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997677589086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1217993932800).

997677589086 is an abundant number, since it is smaller than the sum of its proper divisors (1438310276514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997677589086 is a wasteful number, since it uses less digits than its factorization.

997677589086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13451 (or 13445 counting only the distinct ones).

The product of its (nonzero) digits is 2880541440, while the sum is 81.

The spelling of 997677589086 in words is "nine hundred ninety-seven billion, six hundred seventy-seven million, five hundred eighty-nine thousand, eighty-six".