55784034890 has 16 divisors (see below), whose sum is σ = 103873720680. Its totient is φ = 21544178880.

The previous prime is 55784034811. The next prime is 55784034913. The reversal of 55784034890 is 9843048755.

It can be written as a sum of positive squares in 4 ways, for example, as 53839313089 + 1944721801 = 232033^2 + 44099^2 .

It is a super-2 number, since 2×55784034890² (a number of 22 digits) contains 22 as substring.

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, 96179081 + ... + 96179660.

Almost surely, 2^55784034890 is an apocalyptic number.

55784034890 is a deficient number, since it is larger than the sum of its proper divisors (48089685790).

55784034890 is a wasteful number, since it uses less digits than its factorization.

55784034890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192358777.

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 55784034890 in words is "fifty-five billion, seven hundred eighty-four million, thirty-four thousand, eight hundred ninety".