19879056641 has 8 divisors (see below), whose sum is σ = 22156224480. Its totient is φ = 17724979008.

The previous prime is 19879056629. The next prime is 19879056647. The reversal of 19879056641 is 14665097891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19879056641 - 2⁶ = 19879056577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19879056647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30772211 + ... + 30772856.

It is an arithmetic number, because the mean of its divisors is an integer number (2769528060).

Almost surely, 2^19879056641 is an apocalyptic number.

It is an amenable number.

19879056641 is a deficient number, since it is larger than the sum of its proper divisors (2277167839).

19879056641 is a wasteful number, since it uses less digits than its factorization.

19879056641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61545103.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 19879056641 in words is "nineteen billion, eight hundred seventy-nine million, fifty-six thousand, six hundred forty-one".