19408780880 has 40 divisors (see below), whose sum is σ = 45131281800. Its totient is φ = 7762503168.

The previous prime is 19408780879. The next prime is 19408780891. The reversal of 19408780880 is 8808780491.

It can be written as a sum of positive squares in 4 ways, for example, as 2280253504 + 17128527376 = 47752^2 + 130876^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1055606 + ... + 1073834.

It is an arithmetic number, because the mean of its divisors is an integer number (1128282045).

Almost surely, 2^19408780880 is an apocalyptic number.

19408780880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19408780880 is an abundant number, since it is smaller than the sum of its proper divisors (25722500920).

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

19408780880 is a wasteful number, since it uses less digits than its factorization.

19408780880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31551 (or 31545 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 53.

The spelling of 19408780880 in words is "nineteen billion, four hundred eight million, seven hundred eighty thousand, eight hundred eighty".