997895129250 has 64 divisors (see below), whose sum is σ = 2599039602432. Its totient is φ = 254535564800.

The previous prime is 997895129249. The next prime is 997895129269. The reversal of 997895129250 is 52921598799.

It is a happy number.

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 31 ways as a sum of consecutive naturals, for example, 28907247 + ... + 28941746.

It is an arithmetic number, because the mean of its divisors is an integer number (40609993788).

Almost surely, 2^997895129250 is an apocalyptic number.

997895129250 is an abundant number, since it is smaller than the sum of its proper divisors (1601144473182).

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

997895129250 is a wasteful number, since it uses less digits than its factorization.

997895129250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57849036 (or 57849026 counting only the distinct ones).

The product of its (nonzero) digits is 36741600, while the sum is 66.

The spelling of 997895129250 in words is "nine hundred ninety-seven billion, eight hundred ninety-five million, one hundred twenty-nine thousand, two hundred fifty".