19225615545 has 32 divisors (see below), whose sum is σ = 34198790400. Its totient is φ = 10247686272.

The previous prime is 19225615531. The next prime is 19225615561. The reversal of 19225615545 is 54551652291.

19225615545 is a `hidden beast` number, since 1 + 9 + 2 + 25 + 615 + 5 + 4 + 5 = 666.

It is not a de Polignac number, because 19225615545 - 2¹⁰ = 19225614521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 19225615545.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 196036 + ... + 277274.

It is an arithmetic number, because the mean of its divisors is an integer number (1068712200).

Almost surely, 2^19225615545 is an apocalyptic number.

19225615545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19225615545 is a deficient number, since it is larger than the sum of its proper divisors (14973174855).

19225615545 is a wasteful number, since it uses less digits than its factorization.

19225615545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83006 (or 83000 counting only the distinct ones).

The product of its digits is 540000, while the sum is 45.

The spelling of 19225615545 in words is "nineteen billion, two hundred twenty-five million, six hundred fifteen thousand, five hundred forty-five".