997515909010 has 8 divisors (see below), whose sum is σ = 1795528636236. Its totient is φ = 399006363600.

The previous prime is 997515909007. The next prime is 997515909029. The reversal of 997515909010 is 10909515799.

It can be written as a sum of positive squares in 2 ways, for example, as 842619351249 + 154896557761 = 917943^2 + 393569^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49875795441 + ... + 49875795460.

Almost surely, 2^997515909010 is an apocalyptic number.

997515909010 is a deficient number, since it is larger than the sum of its proper divisors (798012727226).

997515909010 is a wasteful number, since it uses less digits than its factorization.

997515909010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99751590908.

The product of its (nonzero) digits is 1148175, while the sum is 55.

The spelling of 997515909010 in words is "nine hundred ninety-seven billion, five hundred fifteen million, nine hundred nine thousand, ten".