19061561201 has 4 divisors (see below), whose sum is σ = 19676450304. Its totient is φ = 18446672100.

The previous prime is 19061561179. The next prime is 19061561227. The reversal of 19061561201 is 10216516091.

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: 10216516091 = 10333 ⋅988727.

It is a cyclic number.

It is not a de Polignac number, because 19061561201 - 2⁶ = 19061561137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19061161201) 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, 307444505 + ... + 307444566.

It is an arithmetic number, because the mean of its divisors is an integer number (4919112576).

Almost surely, 2^19061561201 is an apocalyptic number.

It is an amenable number.

19061561201 is a deficient number, since it is larger than the sum of its proper divisors (614889103).

19061561201 is an equidigital number, since it uses as much as digits as its factorization.

19061561201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614889102.

The product of its (nonzero) digits is 3240, while the sum is 32.

The spelling of 19061561201 in words is "nineteen billion, sixty-one million, five hundred sixty-one thousand, two hundred one".