17948378497 has 4 divisors (see below), whose sum is σ = 20512432576. Its totient is φ = 15384324420.

The previous prime is 17948378477. The next prime is 17948378501. The reversal of 17948378497 is 79487384971.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79487384971 = 83 ⋅957679337.

It is a cyclic number.

It is not a de Polignac number, because 17948378497 - 2⁷ = 17948378369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17948378447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1282027029 + ... + 1282027042.

It is an arithmetic number, because the mean of its divisors is an integer number (5128108144).

Almost surely, 2^17948378497 is an apocalyptic number.

It is an amenable number.

17948378497 is a deficient number, since it is larger than the sum of its proper divisors (2564054079).

17948378497 is an equidigital number, since it uses as much as digits as its factorization.

17948378497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564054078.

The product of its digits is 85349376, while the sum is 67.

The spelling of 17948378497 in words is "seventeen billion, nine hundred forty-eight million, three hundred seventy-eight thousand, four hundred ninety-seven".