19411598640 has 80 divisors (see below), whose sum is σ = 68772526848. Its totient is φ = 4436936448.

The previous prime is 19411598629. The next prime is 19411598663. The reversal of 19411598640 is 4689511491.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 19411598640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5775582 + ... + 5778941.

Almost surely, 2^19411598640 is an apocalyptic number.

19411598640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19411598640 is an abundant number, since it is smaller than the sum of its proper divisors (49360928208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19411598640 is a wasteful number, since it uses less digits than its factorization.

19411598640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11554546 (or 11554540 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 19411598640 in words is "nineteen billion, four hundred eleven million, five hundred ninety-eight thousand, six hundred forty".