997773901500 has 48 divisors (see below), whose sum is σ = 2905517605536. Its totient is φ = 266073040000.

The previous prime is 997773901499. The next prime is 997773901513. The reversal of 997773901500 is 5109377799.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 332589801 + ... + 332592800.

It is an arithmetic number, because the mean of its divisors is an integer number (60531616782).

Almost surely, 2^997773901500 is an apocalyptic number.

It is an amenable number.

997773901500 is an abundant number, since it is smaller than the sum of its proper divisors (1907743704036).

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

997773901500 is a wasteful number, since it uses less digits than its factorization.

997773901500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665182623 (or 665182611 counting only the distinct ones).

The product of its (nonzero) digits is 3750705, while the sum is 57.

The spelling of 997773901500 in words is "nine hundred ninety-seven billion, seven hundred seventy-three million, nine hundred one thousand, five hundred".