997580574276 has 144 divisors (see below), whose sum is σ = 2762446814400. Its totient is φ = 278324133120.

The previous prime is 997580574257. The next prime is 997580574313. The reversal of 997580574276 is 672475085799.

It is a self number, because there is not a number n which added to its sum of digits gives 997580574276.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7274835 + ... + 7410693.

Almost surely, 2^997580574276 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997580574276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1381223407200).

997580574276 is an abundant number, since it is smaller than the sum of its proper divisors (1764866240124).

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

997580574276 is a wasteful number, since it uses less digits than its factorization.

997580574276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136290 (or 136277 counting only the distinct ones).

The product of its (nonzero) digits is 266716800, while the sum is 69.

The spelling of 997580574276 in words is "nine hundred ninety-seven billion, five hundred eighty million, five hundred seventy-four thousand, two hundred seventy-six".