997696780332 has 48 divisors (see below), whose sum is σ = 2776199741952. Its totient is φ = 272662473600.

The previous prime is 997696780319. The next prime is 997696780349. The reversal of 997696780332 is 233087696799.

It is a Harshad number since it is a multiple of its sum of digits (69).

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 15 ways as a sum of consecutive naturals, for example, 258201169 + ... + 258205032.

It is an arithmetic number, because the mean of its divisors is an integer number (57837494624).

Almost surely, 2^997696780332 is an apocalyptic number.

997696780332 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

997696780332 is an abundant number, since it is smaller than the sum of its proper divisors (1778502961620).

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

997696780332 is a wasteful number, since it uses less digits than its factorization.

997696780332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516406238 (or 516406236 counting only the distinct ones).

The product of its (nonzero) digits is 185177664, while the sum is 69.

The spelling of 997696780332 in words is "nine hundred ninety-seven billion, six hundred ninety-six million, seven hundred eighty thousand, three hundred thirty-two".