997694810870 has 8 divisors (see below), whose sum is σ = 1795850659584. Its totient is φ = 399077924344.

The previous prime is 997694810839. The next prime is 997694810873. The reversal of 997694810870 is 78018496799.

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

It is a self number, because there is not a number n which added to its sum of digits gives 997694810870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997694810873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49884740534 + ... + 49884740553.

It is an arithmetic number, because the mean of its divisors is an integer number (224481332448).

Almost surely, 2^997694810870 is an apocalyptic number.

997694810870 is a deficient number, since it is larger than the sum of its proper divisors (798155848714).

997694810870 is a wasteful number, since it uses less digits than its factorization.

997694810870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99769481094.

The product of its (nonzero) digits is 54867456, while the sum is 68.

The spelling of 997694810870 in words is "nine hundred ninety-seven billion, six hundred ninety-four million, eight hundred ten thousand, eight hundred seventy".