997790848505 has 32 divisors (see below), whose sum is σ = 1316491418880. Its totient is φ = 719968587520.

The previous prime is 997790848501. The next prime is 997790848513. The reversal of 997790848505 is 505848097799.

997790848505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 997790848505 - 2² = 997790848501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (997790848501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3761507 + ... + 4018023.

It is an arithmetic number, because the mean of its divisors is an integer number (41140356840).

Almost surely, 2^997790848505 is an apocalyptic number.

It is an amenable number.

997790848505 is a deficient number, since it is larger than the sum of its proper divisors (318700570375).

997790848505 is a wasteful number, since it uses less digits than its factorization.

997790848505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257089.

The product of its (nonzero) digits is 228614400, while the sum is 71.

The spelling of 997790848505 in words is "nine hundred ninety-seven billion, seven hundred ninety million, eight hundred forty-eight thousand, five hundred five".