997773901501 has 16 divisors (see below), whose sum is σ = 1090010061504. Its totient is φ = 907767506304.

The previous prime is 997773901499. The next prime is 997773901513. The reversal of 997773901501 is 105109377799.

It is a cyclic number.

It is not a de Polignac number, because 997773901501 - 2¹ = 997773901499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997773901571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 985830 + ... + 1722616.

It is an arithmetic number, because the mean of its divisors is an integer number (68125628844).

Almost surely, 2^997773901501 is an apocalyptic number.

It is an amenable number.

997773901501 is a deficient number, since it is larger than the sum of its proper divisors (92236160003).

997773901501 is a wasteful number, since it uses less digits than its factorization.

997773901501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738300.

The product of its (nonzero) digits is 3750705, while the sum is 58.

The spelling of 997773901501 in words is "nine hundred ninety-seven billion, seven hundred seventy-three million, nine hundred one thousand, five hundred one".