1997578005503 has 8 divisors (see below), whose sum is σ = 2115301336272. Its totient is φ = 1879878979456.

The previous prime is 1997578005461. The next prime is 1997578005541. The reversal of 1997578005503 is 3055008757991.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1997578005503 - 2¹⁶ = 1997577939967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997578002503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5906825 + ... + 6235842.

It is an arithmetic number, because the mean of its divisors is an integer number (264412667034).

Almost surely, 2^{1997578005503} is an apocalyptic number.

1997578005503 is a deficient number, since it is larger than the sum of its proper divisors (117723330769).

1997578005503 is a wasteful number, since it uses less digits than its factorization.

1997578005503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12152361.

The product of its (nonzero) digits is 11907000, while the sum is 59.

The spelling of 1997578005503 in words is "one trillion, nine hundred ninety-seven billion, five hundred seventy-eight million, five thousand, five hundred three".