997075857136 has 20 divisors (see below), whose sum is σ = 2045471795712. Its totient is φ = 469212167936.

The previous prime is 997075857131. The next prime is 997075857203. The reversal of 997075857136 is 631758570799.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997075857131) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1832859760 + ... + 1832860303.

Almost surely, 2^997075857136 is an apocalyptic number.

It is an amenable number.

997075857136 is an abundant number, since it is smaller than the sum of its proper divisors (1048395938576).

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

997075857136 is a wasteful number, since it uses less digits than its factorization.

997075857136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3665720088 (or 3665720082 counting only the distinct ones).

The product of its (nonzero) digits is 100018800, while the sum is 67.

The spelling of 997075857136 in words is "nine hundred ninety-seven billion, seventy-five million, eight hundred fifty-seven thousand, one hundred thirty-six".