19360997645 has 18 divisors (see below), whose sum is σ = 25541830986. Its totient is φ = 14078236480.

The previous prime is 19360997633. The next prime is 19360997671. The reversal of 19360997645 is 54679906391.

It can be written as a sum of positive squares in 3 ways, for example, as 391169284 + 18969828361 = 19778^2 + 137731^2 .

It is not a de Polignac number, because 19360997645 - 2⁴ = 19360997629 is a prime.

It is a super-3 number, since 3×19360997645³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3419657 + ... + 3425313.

Almost surely, 2^19360997645 is an apocalyptic number.

It is an amenable number.

19360997645 is a deficient number, since it is larger than the sum of its proper divisors (6180833341).

19360997645 is an frugal number, since it uses more digits than its factorization.

19360997645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11341 (or 5673 counting only the distinct ones).

The product of its (nonzero) digits is 11022480, while the sum is 59.

The spelling of 19360997645 in words is "nineteen billion, three hundred sixty million, nine hundred ninety-seven thousand, six hundred forty-five".