19412547649 has 16 divisors (see below), whose sum is σ = 21258123264. Its totient is φ = 17580556800.

The previous prime is 19412547643. The next prime is 19412547667. The reversal of 19412547649 is 94674521491.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 19412547649 - 2⁷ = 19412547521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19412547596 and 19412547605.

It is not an unprimeable number, because it can be changed into a prime (19412547643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4299217 + ... + 4303729.

It is an arithmetic number, because the mean of its divisors is an integer number (1328632704).

Almost surely, 2^19412547649 is an apocalyptic number.

It is an amenable number.

19412547649 is a deficient number, since it is larger than the sum of its proper divisors (1845575615).

19412547649 is a wasteful number, since it uses less digits than its factorization.

19412547649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5928.

The product of its digits is 2177280, while the sum is 52.

The spelling of 19412547649 in words is "nineteen billion, four hundred twelve million, five hundred forty-seven thousand, six hundred forty-nine".